大方廣圓覺修多羅了義經略疏 1.401

1.401

顯上所流真如等法之業用也。菩薩是所教，真如等是能教故。謂真如是理，次二是果，波羅蜜是因，理實因果是可軌故。謂約其情執即似都無，情既本空，此非新得。頓悟理者，依之修行，能生物解，名為教授。故論云：「順本性故修行檀等。」涅槃亦說諸佛師法。

This reveals the activity and function of the dharmas such as tathatā that flow forth above. The bodhisattvas are that which is taught, and tathatā and the rest are that which teaches. That is, tathatā is the principle, the next two are the fruit, and pāramitā is the cause; principle, reality, cause, and fruit can serve as models. In terms of emotional clinging, they seem to be non-existent; but since emotional clinging is originally empty, these are not newly obtained. Those who suddenly awaken to the principle cultivate according to it and can generate understanding in living beings; this is called 'instruction'. Thus the treatise says: 'Cultivating giving and the rest in accordance with the original nature.' The *Nirvāṇa [Sūtra]* also speaks of the buddhas taking the Dharma as their teacher.