Three yanas of powerful transformative methods
Three yanas of powerful transformative methods (Tib. wangyur tab kyi tekpa sum; Wyl. dbang sgyur thabs kyi theg pa gsum) — within the classification of nine yanas, these are the three yanas based on the three inner tantras of the Nyingma school:
You might wonder why these are called ‘vehicles of powerful transformative methods.’ It is because they include powerful methods for transforming all phenomena into great purity and equalness.
- Tulku Thondup, Masters of Meditation and Miracles, edited by Harold Talbott (Boston: Shambhala, 1996), Part One, 'Lineages of Three Major Nyingma Inner Tantras'.