大乘起信論裂網疏 6.150

6.150

此正所謂十方薄伽梵一路涅槃門也。三世菩薩非此不成大乘淨信，故勸欲成二利行者，必當勤修學也。此四段文即順四悉檀說，可准思之。二正說五分竟。

This is precisely what is called 'the one single gateway to nirvāṇa of the Bhagavats of the ten directions'. Bodhisattvas of the three periods cannot accomplish pure faith in the Mahāyāna apart from this; hence it exhorts those who wish to accomplish the practices of the two benefits that they must diligently cultivate and study it. These four passages are expounded in accordance with the four siddhāntas, which can be reflected on accordingly. The main exposition of the five sections is concluded.