Toh 4390Untitled

Exposition of Sutra Toh 4390 — The Tengyur Treatise Collection

Context

Toh 4390 in the Tengyur of the Northern Tibetan tradition is an exegetical work belonging to the Abhidharma Basket, the third division of the Buddhist Tripitaka. The Abhidharma in the Mahayana tradition—particularly as preserved through Tibetan translations and the treatises of Tibetan masters—focuses on the detailed analysis of phenomena (dharma) and the qualities of consciousness, providing a firm theoretical foundation for practicing the bodhisattva path.

Although no specific title for this scripture is recorded in the descriptive information, it forms part of the treasury of the Abhidharma—something of exceptional importance in the Northern Tibetan tradition. The works in the Tengyur are expositions by Indian sages who lived after the time of the Buddha, guiding readers toward a profound understanding of the scriptures in the Sutra Collection.

Main Content

The Abhidharma of the Northern Tibetan Mahayana tradition aims to classify and deeply elucidate phenomena (skandha), mental factors (dharma), and the causal relationships between actions and their results. These expositions establish a system of thought for practicing bodhisattva awakening—directed not only toward personal liberation but also toward the awakening of all sentient beings.

Within the framework of the Northern Tibetan tradition, Abhidharma is not regarded merely as philosophical theory, but as an essential part of the dharmadhātu, helping monastics correctly discern the nature of phenomena. Through it, they can avoid misconceptions born of ignorance (avidyā) and develop right view (samyak-dṛṣṭi).

Northern Tibetan masters such as Tsongkhapa emphasized that the study of Abhidharma is a prerequisite for practicing Tantra safely and effectively. As part of this treasury, Sutra Toh 4390 provides detailed understanding of the structure of consciousness, the types of consciousness (vijñāna), and how these factors interact in states of unconsciousness and wakefulness and during the process of cultivation.