大乘起信論裂網疏 4.35

4.35

問意有二：一者同有真如，則不應有信不信；二者等皆熏習，則應一時發意、一時修行乃至一時涅槃，不應復有前後，尤不應有退與不退、三乘一乘、若漸若頓，無量差別也。

The intent of the question has two points: first, since they equally possess tathatā, there should not be those with faith and those without faith; second, since they are equally perfumed, they should simultaneously arouse aspiration, simultaneously cultivate, and even simultaneously attain nirvāṇa; there should no longer be earlier and later, and especially there should not be retrogressing and non-retrogressing, the three vehicles and the one vehicle, gradual or sudden, and immeasurable distinctions.