四明十義書 2.22

2.22

若但指示修行處者，只合教義之後，但云觀心在彼《止觀》也。何假費詞示其事法觀門耶？然觀《發揮》立廢觀心所以，只云《妙玄》事釋既廣、理觀（此中觀字有何所以，只將談理便為理觀）稍疎，故用觀心。今文圓談法性，故不用觀心。

If it merely pointed out the place of practice, then following the doctrinal meaning, it should have simply said that contemplation of the mind is in that Zhiguan. Why waste words demonstrating the phenomenal contemplation gate? However, examining the Fahui's reasons for establishing and abolishing contemplation of the mind, it merely says that because the Miaoxuan's phenomenal explanations are extensive and its contemplation of principle (what basis does the word 'contemplation' have here? It merely takes discussing principle as principle contemplation) is somewhat sparse, contemplation of the mind is employed; whereas the present text perfectly discusses dharmatā, so contemplation of the mind is not employed.