大乘起信論略述 2.174

2.174

[Treatise:] Cultivation has five gates that can accomplish this faith. [Commentary:] Below, answering about cultivation, there are three parts: first, raising the number to indicate the intent; next, listing the names according to the number; afterwards, explaining them individually according to their names. This is the first. Although previously one learned to arouse the fourfold faithful mind in virtues, if it is not accomplished through practice, then faith is not firm; unformed faith regresses upon meeting conditions. Therefore, one cultivates the five practices to accomplish the four faiths.