The first of the three higher yogas according to the classification of the Dharma into nine vehicles. In this yoga, the main stress is put on the generation phase (bskyed rim). [WOMPT, 1998] [ZT, 2006]

The first of the three inner tantras in the Nyingma system of nine vehicles. Here the emphasis is placed on the generation stage practices. [LLB, 2002]

The first of the three inner tantras according to the Nyingma classification. Its chief tantra is the Guhyagarbha, which expounds the view of purity and equality (dag mnyam chen po), a central principle of the Vajrayana. All appearances in their purity are the mandala of the kayas and wisdoms. This comprises the superior relative truth. Being pure, they are all equal, wisdom and emptiness united. This is superior absolute truth.The "pure" status of the appearing mode and the "equal" status of the absolute mode of being are present indivisibly in every phenomenon. This is referred to as the great dharmakaya. [CMH, 2001]