大乘起信論裂網疏 5.54

5.54

值佛菩薩，修行諸行，可謂有因有緣矣。特以未滿十千大劫，十心未圓，故雖遇緣發心，未能即入正定聚也。若使十千劫滿，則見相供僧等緣，並可發心入正定聚。勿謂此緣非好緣也，但由積因力弱，故與大悲、護法二種發心不同。故遇好緣則能發心，設遇惡緣或能退墮二乘地也。初釋信成就竟。

Encountering Buddhas and bodhisattvas and cultivating all practices can indeed be called having causes and conditions. Merely because ten thousand great kalpas have not been fulfilled and the ten minds are not yet complete, even though they generate the mind upon encountering conditions, they cannot immediately enter the rightly determined group. If ten thousand kalpas were fulfilled, then conditions such as seeing the physical form or making offerings to the Saṅgha would all allow them to generate the mind and enter the rightly determined group. Do not say that these conditions are not good conditions; it is simply that the power of accumulated causes is weak, so it differs from the two kinds of generating the mind from great compassion and from protecting the Dharma. Therefore, encountering good conditions they are able to generate the mind, but should they encounter evil conditions, they may regress and fall into the stages of the two vehicles. The first [part], explaining the fulfillment of faith, is concluded.