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“The Chapter on Going Forth” is the first of seventeen chapters in The Chapters on Monastic Discipline, a four-volume work that outlines the statutes and procedures that govern life in a Buddhist monastic community. This first chapter traces the development of the rite by which postulants were admitted into the monastic order, from the Buddha Śākyamuni’s informal invitation to “Come, monk,” to the more elaborate “Present Day Rite.” Along the way, the posts of preceptor and instructor are introduced, their responsibilities defined, and a dichotomy between elders and immature novices described. While the heart of the chapter is a transcript of the “Present Day Rite,” the text is interwoven with numerous narrative asides, depicting the spiritual ferment of the north Indian region of Magadha during the Buddha’s lifetime, the follies of untrained and unsupervised apprentices, and the need for a formal system of tutelage.

The Bhaiṣajyavastu, “The Chapter on Medicines,” is a part of the Mūlasarvāstivāda Vinaya, the corpus of monastic law of one of the most influential Buddhist schools in India. This chapter deals with monastic regulations about medicines. At the same time, it also includes various elements not restricted to such rules: stories of the Buddha and his disciples, a lengthy story of the Buddha’s journey for the purpose of quelling an epidemic and converting a nāga, a number of stories of the Buddha’s former lives narrated by the Buddha himself, and a series of verses recited by the Buddha and his disciples about their former lives. Thus, this chapter preserves not only interesting information about medical knowledge shared by ancient Indian Buddhist monastics but also an abundance of Buddhist narrative literature.

The Perfection of Wisdom in 25,000 Lines is the second longest of the six ‘mother’ Prajñāpāramitā texts (yum drug). It comprises three entire volumes of the Kangyur (vols. 26-28) and is divided into 76 chapters relating dialogues between the Buddha and senior disciples, notably Śāriputra, Subhūti and Ānanda.

With some exceptions, the text parallels the structure of the other Perfection of Wisdom sūtras, especially the Prajñāpāramitā in 10,000 Lines, yet it has traditionally been regarded as more influential, analyzing the bodhisattvas’ transcendent perfections in considerably greater detail, and showing how bodhisattvas should practise them without ever considering either their practice, or any other phenomena whatsoever, as truly existing.

An original Sanskrit version found in Gilgit exists, as well as four distinct Chinese translations. There is also an important recast Sanskrit manuscript, possibly of 5th century origin, which divides the text according to the eight sections of Asaṅga-Maitreya’s famous treatise, the Abhisamayālaṃkāra. The Tibetan text dates from the 9th century. There are several important commentaries on the text in the Tengyur, by Haribhadra, Smṛtijñānakīrti, Vimuktasena and others.

Estimated to be completed in 8 years.

While dwelling at Vulture Peak near Rāja­gṛha, the Buddha sets in motion the sūtras that are the most extensive of all‍—the sūtras on the Prajñā­pāramitā, or “Transcendent Perfection of Wisdom.” Committed to writing around the start of the first millennium, these sūtras were expanded and contracted in the centuries that followed, eventually amounting to twenty-three volumes in the Tibetan Kangyur. Among them, The Transcendent Perfection of Wisdom in Ten Thousand Lines is a compact and coherent restatement of the longer versions, uniquely extant in Tibetan translation, without specific commentaries, and rarely studied. While the structure generally follows that of the longer versions, chapters 1–2 conveniently summarize all three hundred and sixty-seven categories of phenomena, causal and fruitional attributes which the sūtra examines in the light of wisdom or discriminative awareness. Chapter 31 and the final chapter 33 conclude with an appraisal of irreversible bodhisattvas, the pitfalls of rejecting this teaching, and the blessings that accrue from committing it to writing.

This sūtra takes the form of a series of dialogues between the Buddha Śākyamuni, Subhūti, Śāriputra, and others such as Indra, the king of gods, and a Goddess of the Ganges, and as well as setting out the teachings on emptiness as such it describes the path and practices that a bodhisattva should take to integrate this understanding of phenomena and finally realize it. A special feature of this particular sūtra are the inspirational narratives of Sadāprarudita and his quest for the teachings on the Perfection of Wisdom from the Bodhisattva Dharmodgata, contained in the final three chapters.

This is an important and popular Mahāyāna sūtra which sets out in detail the characteristics, qualities and accomplishments of the ten bodhisattva levels. Forming part of the Avataṃsaka sūtra, this text is often considered a sūtra in its own right, and is frequently quoted in many commentarial materials.

The Chapter Teaching the Purification of Boundless Gateways consists of an extended discourse presented by the Buddha to his bodhisattva disciple Anantavyūha. The instruction consists of a so-called dhāraṇī gateway, a teaching that involves a series of dhāraṇī spells, which are interspersed throughout. The teaching is generally concerned with well-known Mahāyāna Buddhist themes, ranging from the lack of inherent identity to the qualities of complete awakening, but these topics are here presented within a larger exegesis on the meaning of the dhāraṇī gateway.

Teaching the Unfathomable Secrets of the Tathāgatas is a fascinating third turning mahayāna sūtra extracted from the larger Ratnakūṭa sūtra that explores a diversity of topics across 24 chapters and an epilogue.

Both the Buddha and Vajrapāṇi teach, discussing the secrets of the body, speech, and mind of the bodhisattvas and the buddhas, nonduality, the relationship of the nature of mind to the qualities of buddhas and bodhisattvas, and other subjects. It follows a consistently nondual perspective ‍— identifying that while an awakened being may seem to be engaged in a conceptual or dualistic action, they never leave the scope of nonconceptual wisdom. It reveals the extraordinary freedom that awakened beings have in their acting in the world.

The Teaching of the Armor Array describes a dialog between the Buddha Śākyamuni and the bodhisattva Anantamati. The sūtra is primarily concerned with the great armor, a quality related to the perfection of insight. As such, it is no conventional sort of armor. Rather, donning it involves giving up all grasping at phenomena, and engaging diligently on the path, with insight into the nature of phenomena. The Buddha and Anantamati also discuss the nature of the Great Vehicle and the great path, all the while emphasizing their emptiness and lack of marks.

An important sūtra from the Ratnakuta (“Heap of Jewels”) collection that sets out in detail the stages and practices of the path of the Bodhisattva vehicle. It contains extensive explanations on key Mahāyāna practices, including the Four Immeasurable Thoughts, Six Perfections, and more.

In this sūtra, the Buddha Śākyamuni explains the connection between the bodhisattvas’ aspirations and the virtues of their future buddha realms. He describes the various qualities that help bodhisattvas bring their aspirations to fulfillment. After bodhisattvas arrive from all directions to hear his teachings on the virtues of the buddha realms, the Buddha Śākyamuni recounts the story of how Mañjuśrī first engendered the mind set on awakening. Finally, the Buddha reveals the extraordinariness of Mañjuśrī’s bodhisattva aspirations, and how they will contribute to the exceptional qualities of his future buddha realm.

In Veṇuvana, outside Rājagṛha, Pūrṇa Maitrāyaṇīputra asks the Buddha about the conduct of bodhisattvas practicing on the path to awakening. The Buddha replies by describing the attitudes that bodhisattvas must possess as well as their benefits. Then, at the request of Maudgalyāyana, the Buddha recounts several of his past lives in which he himself practiced bodhisattva conduct. At the end of the teaching, the Buddha instructs the assembly about how to deal with specific objections to his teachings that outsiders might raise after he himself has passed into nirvāṇa.

The Play in Full tells the story of how the Buddha manifested in this world and attained awakening, as perceived from the perspective of the Great Vehicle. The sūtra, which is structured in twenty-seven chapters, first presents the events surrounding the Buddha’s birth, childhood, and adolescence in the royal palace of his father, king of the Śākya nation. It then recounts his escape from the palace and the years of hardship he faced in his quest for spiritual awakening. Finally the sūtra reveals his complete victory over the demon Māra, his attainment of awakening under the Bodhi tree, his first turning of the wheel of Dharma, and the formation of the very early saṅgha.

This sūtra, one of the longest scriptures in the General Sūtra section of the Kangyur, outlines the path of the Great Vehicle as it is journeyed by bodhisattvas in pursuit of awakening. The teaching, which is delivered by the Buddha Śākyamuni to a host of bodhisattvas from faraway worlds as well as a selection of his closest hearer students, such as Śāradvatī­putra and Ānanda, elucidates in particular the practice of engendering and strengthening the mind of awakening, as well as the practice of bodhisattva conduct for the sake of all other beings.

In Unraveling the Intent, the Buddha gives a systematic overview of his three great cycles of teachings, which he refers to in this text as the “three Dharma wheels” (tri­dharma­cakra). In the process of delineating the meaning of these doctrines, the Buddha unravels several difficult points regarding the ultimate and relative truths, the nature of reality, and the contemplative methods conducive to the attainment of complete and perfect awakening, and he also explains what his intent was when he imparted teachings belonging to each of the three Dharma wheels. In unambiguous terms, the third wheel is proclaimed to be of definitive meaning. Through a series of dialogues with hearers and bodhisattvas, the Buddha thus offers a complete and systematic teaching on the Great Vehicle, which he refers to here as the Single Vehicle.

The sūtra describes a previous life of Śākyamuni Buddha when he was a court priest to a king. He makes his prayer to become a buddha and causes the king, his princes, his own sons and pupils, and others, to also take the same vow. This is revealed to be the major event that is the origin of buddhas and bodhisattvas such as Amitābha, Akṣobhya, Avalokiteśvara, Mañjuśrī, and the thousand buddhas of our eon.

The “white lotus of compassion” in the title refers to Śākyamuni himself, emphasizing his superiority over all other buddhas, like a fragrant, healing white lotus among a bed of ordinary flowers. He chose to be reborn in an impure realm during the degenerate times. Because of this courageous vow of great compassion, Śākyamuni is considered one of the greatest buddhas.

The White Lotus of the Good Dharma, popularly known as the Lotus Sūtra, is taught by Buddha Śākyamuni on Vulture Peak to an audience that includes bodhisattvas from countless realms, as well as bodhisattvas who emerge out from the ground from the space below this world. Buddha Prabhūtaratna, who has long since passed into nirvāṇa, appears within a floating stūpa to hear the sūtra, and Śākyamuni enters the stūpa and sits beside him. The Lotus Sūtra is celebrated, particularly in East Asia, for its presentation of crucial elements of the Mahāyāna tradition, such as the doctrine that there is only one yāna, or “vehicle”; the distinction between expedient and definite teachings; and the notion that the Buddha’s life, enlightenment, and parinirvāṇa were simply manifestations of his transcendent buddhahood, while he continues to teach eternally. A recurring theme in the sūtra is its own significance in teaching these points during past and future eons, with many passages in which the Buddha and bodhisattvas such as Samantabhadra describe the great benefits that come from devotion to it, the history of its past devotees, and how it is the Buddha’s ultimate teaching, supreme over all other sūtras.

The Basket’s Display (Kāraṇḍavyūha) is the source of the most prevalent mantra of Tibetan Buddhism: oṁ maṇipadme hūṁ. It marks a significant stage in the growing importance of Avalokiteśvara within Indian Buddhism in the early centuries of the first millennium. In a series of narratives within narratives, the sūtra describes Avalokiteśvara’s activities in various realms and the realms contained within the pores of his skin. It culminates in a description of the extreme rarity of his mantra, which, on the Buddha’s instructions, Bodhisattva Sarva­nīvaraṇa­viṣkambhin obtains from someone in Vārāṇasī who has broken his monastic vows. This sūtra provided a basis and source of quotations for the teachings and practices of the eleventh-century Maṇi Kabum, which itself served as a foundation for the rich tradition of Tibetan Avalokiteśvara practice.

In this sūtra the Buddha Śākyamuni recounts how the thus-gone Sarvārthasiddha purified the buddha realms in his domain. In his explanation, the Buddha Śākyamuni emphasizes the view of the Great Vehicle, which he explains as the fundamental basis for all bodhisattvas who aspire to attain liberation. The attendant topics taught by the Buddha are the six perfections of generosity, discipline, patience, diligence, concentration, and wisdom. The Buddha explains each of these six perfections in three distinct ways as he recounts the past lives of the buddha Sarvārthasiddha. First, he describes how Sarvārthasiddha learned the practices that purify buddha realms, namely the six perfections. Next, he explains how to seal these six virtuous practices with the correct view so that they become perfections. Finally, he recounts how Sarvārthasiddha, as a bodhisattva, received instructions for enhancing the potency of the perfections.

This sūtra, much quoted in later Buddhist writings for its profound statements especially on the nature of emptiness, relates a long teaching given by the Buddha mainly in response to questions put by a young layman, Candraprabha. The samādhi that is the subject of the sūtra, in spite of its name, primarily consists of various aspects of conduct, motivation, and the understanding of emptiness; it is also a way of referring to the sūtra itself. The teaching given in the sūtra is the instruction to be dedicated to the possession and promulgation of the samādhi, and to the necessary conduct of a bodhisattva, which is exemplified by a number of accounts from the Buddha’s previous lives. Most of the teaching takes place on Vulture Peak Mountain, with an interlude recounting the Buddha’s invitation and visit to Candraprabha’s home in Rājagṛha, where he continues to teach Candraprabha before returning to Vulture Peak Mountain. In one subsequent chapter the Buddha responds to a request by Ānanda, and the text concludes with a commitment by Ānanda to maintain this teaching in the future.

In this sūtra the Buddha Śākyamuni teaches how bodhisattvas proceed to awakening, without ever regressing, by relying on an absorption known as the miraculous ascertainment of peace. He lists the very numerous features of this absorption, describes how to train in it, and explains how through this training bodhisattvas develop all the qualities of buddhahood. The “peace” of the absorption comes from the relinquishment of misconceptions and indeed of all concepts whatsoever, and the sūtra provides a profound and detailed survey of how all the abilities, attainments, and other qualities of the bodhisattva’s path arise as the bodhisattva’s understanding and realization of what is meant by the Thus-Gone One unfold.

The Absorption That Encapsulates All Merit tells the story of Vimalatejā, a strongman renowned for his physical prowess, who visits the Buddha in order to compare abilities and prove that he is the mightier of the two. He receives an unexpected, humbling riposte in the form of a teaching by the Buddha on the inconceivable magnitude of the powers of awakened beings, going well beyond mere physical strength. The discussions that then unfold‍—largely between the Buddha, Vimalatejā, and the bodhisattva Nārāyaṇa‍—touch on topics including the importance of creating merit, the centrality of learning and insight, and the question of whether renunciation entails monasticism. Above all, however, Vimalatejā is led to see that the entirety of the Great Vehicle path hinges on the practice that forms the name of the sūtra, which is nothing other than the mind of awakening (bodhicitta).

The Ratnaketu Dhāraṇī is one of the core texts of the Mahāsannipāta collection of Mahāyāna sūtras that dates back to the formative period of Mahāyāna Buddhism, from the first to the third century ᴄᴇ. Its rich and varied narratives, probably redacted from at least two independent works, recount significant events from the lives, past and present, of the Buddha Śākyamuni and some of his main followers and opponents, both human and nonhuman. At the center of these narratives is the climactic episode from the Buddha’s life when Māra, the personification of spiritual death, sets out to destroy the Buddha and his Dharma. The mythic confrontation between these paragons of light and darkness, and the Buddha’s eventual victory, are related in vivid detail. The main narratives are interwoven with Dharma instructions and interspersed with miraculous events. The text also exemplifies two distinctive sūtra genres, “prophecies” (vyākaraṇa) and “incantations” (dhāraṇī), as it includes, respectively, prophecies of the future attainment of buddhahood by some of the Buddha’s followers and the potent phrases that embody the Buddha’s teachings and are meant to ensure their survival and the thriving of its practitioners.

The Dhāraṇī of the Jewel Torch starts with a profound conversation between the Buddha and the bodhisattvas Samantabhadra and Mañjuśrī on the nature of the dharmadhātu, buddhahood, and emptiness. The bodhisattva Dharma­mati then enters the meditative absorption called the infinite application of the bodhisattva’s jewel torch and, at the behest of the millions of buddhas who have blessed him, emerges from it to teach how bodhisattvas arise from the presence of a tathāgata and progress to the state of omniscience. Following Dharma­mati’s detailed exposition of the “ten categories” or progressive stages of a bodhisattva, the Buddha briefly teaches the mantra of the dhāraṇī and then, for most of the remainder of the text, encourages bodhisattvas in a long versified passage in which he recounts teachings by a bodhisattva called Bhadraśrī on the qualities of bodhisattvas and buddhas. Some verses from this passage on the virtues of faith have been widely quoted in both India and Tibet.

The Teaching on the Great Compassion of the Tathāgata opens with the Buddha presiding over a large congregation of disciples at Vulture Peak. Entering a special state of meditative absorption, he magically displays a pavilion in the sky, attracting a vast audience of divine and human Dharma followers. At the request of the bodhisattva Dhāraṇīśvara­rāja, the Buddha gives a discourse on the qualities of bodhisattvas, which are specified as bodhisattva ornaments, illuminations, compassion, and activities. He also teaches about the compassionate awakening of tathāgatas and the scope of a tathāgata’s activities. At the request of a bodhisattva named Siṃhaketu, Dhāraṇīśvara­rāja then gives a discourse on eight dhāraṇīs, following which the Buddha explains the sources and functions of a dhāraṇī known as the jewel lamp. As the text concludes, various deities and Dharma protectors praise the sūtra’s qualities and vow to preserve and protect it in the future, and the Buddha entrusts the sūtra and its propagation to Dhāraṇīśvara­rāja. The sūtra is a particularly rich source of detail on the qualities of bodhisattvas and buddhas.

Heralded by a miraculous flood, the celestial bodhisattva Sāgaramati arrives in Rājagṛha to engage in a Dharma discussion with Buddha Śākyamuni. He discusses an absorption called “The Pristine and Immaculate Seal” and many other subjects relevant to bodhisattvas who are in the process of developing the mind of awakening and practicing the bodhisattva path. The sūtra strongly advises that bodhisattvas not shy away from the afflictive emotions of beings‍—no matter how unpleasant they may be‍—and that insight into these emotions is critical for a bodhisattva’s compassionate activity. The sūtra deals with the preeminence of wisdom and non-grasping on the path. In the end, as a teaching on how to deal with māras, the sūtra illuminates the many pitfalls possible on the path of the Great Vehicle.

The Questions of the Kiṃnara King Druma, initiated by the questions of the bodhisattva Divyamauli, consists of a series of teachings by the kiṃnara king Druma, given within a rich narrative framework in which music plays a central role in teaching the Dharma. This sūtra presents a variety of well-known Great Vehicle Buddhist themes, but special attention is given to the six bodhisattva perfections and the perfection of skillful means, as well as to the doctrine of emptiness that is discussed throughout the text.

In this sūtra, the Buddha Śākyamuni and a number of the bodhisattvas, elders, and gods in his assembly engage in a lively exchange clarifying many key points of the Dharma from the perspective of the Mahāyāna, including the four truths, the origin of saṃsāra, and the identity of the buddhas, while praising the qualities of the paragons of the Mahāyāna, the bodhisattvas.

The bodhisatva Akṣayamati arrives in our world from the buddha field of the buddha Samantabhadra. In response to Śāriputra’s questions, Akṣayamati gives a discourse on the subject of imperishability. In all, Akṣayamati explains that there are eighty different aspects of the Dharma that are imperishable. When he has given this explanation, the Buddha praises it and declares it worthy of being spread by the countless bodhisatvas gathered there to listen.

In the Introduction to the Domain of the Inconceivable Qualities and Wisdom of the Tathāgatas, the bodhisattva Sarva­nīvaraṇa­viṣkambhin expounds at length on how the awakened activity of the buddhas spontaneously unfolds in a limitless variety of ways to benefit beings, in all their diversity, throughout the universe. He also describes the inestimable benefits a bodhisattva derives from following a virtuous spiritual friend.

On Gayāśīrṣa Hill, Buddha Śākyamuni is visited by a great gathering of bodhisattvas who have traveled miraculously there from a distant world, to venerate him as one who has vowed to liberate beings in a world much more afflicted than their own. The visiting bodhisattvas are led by Sarva­nīvaraṇa­viṣkam­bhin, who asks the Buddha a series of searching questions. In response, the Buddha gives a detailed and systematic account of the practices, qualities, and nature of bodhisattvas, the stages of their path, their realization, and their activities. Many of the topics are structured into sets of ten aspects, expounded with reasoned explanations and illustrated with parables and analogies. This sūtra is said to have been one of the very first scriptures translated into Tibetan. Its doctrinal richness, profundity, and clarity are justly celebrated, and some of its key statements on meditation, the realization of emptiness, and the fundamental nature of the mind have been widely quoted in the Indian treatises and Tibetan commentarial literature.

While on the way to Rājagṛha to collect alms, a group of newly ordained monks are approached by some non-Buddhists, who suggest that their doctrine is identical to that of the Buddha, since everyone agrees that misdeeds of body, speech, and mind are to be given up. The monks do not know how to reply, and when they later return to the brahmin town of Nālati, where the Buddha is residing, Śāradvatīputra therefore encourages them to seek clarification from the Blessed One himself. In response to the monks’ request, the Buddha delivers a comprehensive discourse on the effects of virtuous and unvirtuous actions, explaining these matters from the perspective of an adept practitioner of his teachings, who sees and understands all this through a process of personal discovery. As the teaching progresses, the Buddha presents an epic tour of the realm of desire‍—from the Hell of Ultimate Torment to the Heaven Free from Strife‍—all the while introducing the specific human actions and attitudes that cause the experience of such worlds and outlining the ways to remedy and transcend them. In the final section of the sūtra, which is presented as an individual scripture on its own, the focus is on mindfulness of the body and the ripening of karmic actions that is experienced among humans in particular.

The sūtra The Hundred Deeds, whose title could also be translated as The Hundred Karmas, is a collection of stories known as avadāna‍—a narrative genre widely represented in the Sanskrit Buddhist literature and its derivatives‍—comprising more than 120 individual texts. It includes narratives of Buddha Śākyamuni’s notable deeds and foundational teachings, the stories of other well-known Buddhist figures, and a variety of other tales featuring people from all walks of ancient Indian life and beings from all six realms of existence. The texts sometimes include stretches of verse. In the majority of the stories the Buddha’s purpose in recounting the past lives of one or more individuals is to make definitive statements about the karmic ripening of actions across multiple lifetimes, and the sūtra is perhaps the best known of the many works in the Kangyur on this theme.

The tantra Emergence from Sampuṭa is an all-inclusive compendium of Buddhist theory and practice as taught in the two higher divisions of the Yoga class of tantras, the “higher” (uttara) and the “highest” (niruttara), or, following the popular Tibetan classification, the Father and the Mother tantras. Dating probably to the end of the tenth century, the bulk of the tantra consists of a variety of earlier material, stretching back in time and in the doxographical hierarchy to the Guhyasamāja, a text traditionally regarded as the first tantra in the Father group. Drawing from about sixteen well-known and important works, including the most seminal of the Father and Mother tantras, it serves as a digest of this entire group, treating virtually every aspect of advanced tantric theory and practice. It has thus always occupied a prominent position among canonical works of its class, remaining to this day a rich source of quotations for Tibetan exegetes.

The Detailed Account of the Previous Aspirations of the Seven Thus-Gone Ones opens in Vaiśālī, where the Buddha Śākyamuni is seated with a saṅgha of eight thousand monks, thirty-six thousand bodhisattvas, and a large gathering of gods, spirit beings, and humans. As Śākyamuni concludes his teaching, the bodhisattva Mañjuśrī rises from his seat and requests that the Buddha give a Dharma teaching that will benefit all the human and nonhuman beings who are present in the assembly. Specifically, he asks Śākyamuni to teach them about the previous aspirations of seven buddhas, their buddhafields, and the benefits that those buddhas can bring to beings who live in the final five hundred years, when the holy Dharma is on the verge of disappearing. Śākyamuni agrees to this request and proceeds to give a detailed account of the previous aspirations of those seven buddhas to benefit beings who are veiled by karmic obscurations, tormented by illnesses, and plagued by mental anguish and suffering.

The Detailed Account of the Previous Aspirations of the Blessed Bhaiṣajya­guru­vaiḍūrya­prabha centers on the figure commonly known as the Medicine Buddha. The text opens in Vaiśālī, where the Buddha Śākyamuni is seated with a large retinue of human and divine beings. The bodhisattva Mañjuśrī asks Śākyamuni to teach the names and previous aspirations of the buddhas, along with the benefit that buddhas can bring during future times when the Dharma has nearly disappeared. The Buddha gives a teaching on the name and previous aspirations of the Buddha Bhaiṣajya­guru­vaiḍūrya­prabha, and then details the benefits that arise from hearing and retaining this buddha’s name.

The Mañjuśrī­mūla­kalpa is the largest and most important single text devoted to Mañjuśrī, the bodhisattva of wisdom. A revealed scripture, it is, by its own classification, both a Mahāyāna sūtra and a Mantrayāna kalpa (manual of rites). Because of its ritual content, it was later classified as a Kriyā tantra and assigned, based on the hierarchy of its deities, to the Tathāgata subdivision of this class. The Sanskrit text as we know it today was probably compiled throughout the eighth century ᴄᴇ and several centuries thereafter. What makes this text special is that, unlike most other Kriyā tantras, it not only describes the ritual procedures, but also explains them in terms of general Buddhist philosophy, Mahāyāna ethics, and the esoteric principles of the early Mantrayāna (later called Vajrayāna), with an emphasis on their soteriological aims.