The bodhisattva Maitreya compiled the sutras of the third turning of the wheel, composed the five treatises named after him (which establish the view of "emptiness of other," gzhan stong), and taught them to Asaṅga. Asaṅga further wrote Five Treatises on the Grounds (sa de lnga) and other works, while his brother Vasubandhu, after embracing the Mahāyāna, composed eight prakaraṇas, or explanatory texts. These are the source of the tradition of Vast Activities, which expounds the teaching on the buddha nature and the bodhisattva bhūmis, and so on. This tradition was upheld and propagated by such masters as Dignāga, Dharmakīrti,, and Candragomin. The ritual of the vow, and practice of bodhichitta, according to this tradition was introduced to Tibet by Atiśa. [TPQ, 2010]