瑜伽論記 9.57

9.57

測云：何故說此二者？解云：無除二種愚故，謂真實義愚及世俗愚，又為顯二智故，謂勝義世俗二智故，或可欲顯自利利他二門故，約二諦門以釋文者，諸法真實性者即是二空所顯真如，即是諸法本性，故云如所有性，諸法真實性也，後辨四真實中開為二，後二障淨智所行真實是。

Ce says: Why are these two taught? It is explained: because of eliminating two kinds of ignorance, namely ignorance regarding the meaning of reality and ignorance regarding the conventional. Furthermore, it is to reveal the two wisdoms, namely the two wisdoms of the ultimate and the conventional. Alternatively, it may be because one wishes to reveal the two approaches of self-benefit and benefiting others. If one explains the text in terms of the approach of the two truths: the real nature of all dharmas is the tathatā revealed by the two kinds of emptiness, which is the original nature of all dharmas; hence it is called 'the nature of how things are,' the real nature of all dharmas. Later, in analyzing the four realities, it is divided into two: the latter two, which are the reality that is the domain of purified wisdom, are it.