Full context:   This division into four parts (quadripartition) can even be found within a single school of thought. In the Bardo Thödol, the famous Tibetan Buddhist treatise, the succession of the four "Buddhas" following the appearance of Vairocana (the master of all objects of knowledge) shows the four-fold nature of points of view and paths to wisdom: through conjoining with Vajrasattva Aksobhya (representing wisdom "like a mirror"), through objectivation with Ratnasambhava (representing the wisdom of equanimity), through individuation with Amitabha (representing discriminative wisdom), and through participation with Amoghasiddhi (representing the wisdom of "he who can accomplish all things").