大乘起信論廣釋卷第三．四．五 5.113

5.113

論。以是義故至不相捨離　釋曰。次下第二總結雙運。於中有二。初顯具位。後明闕失。此初也。以是順理對治義故。而止與觀共相助也。凡夫由止對治住著而起精進。二乘因止故謂怯弱而生大悲。此則以止助成觀也。二乘不觀心行生滅。凡夫不觀無我不淨。無以厭離而住於止。此即以觀而助於止。故言止觀共相助成。

[Treatise:] For this reason, [the two gates of calming and contemplation assist each other and are not separated from one another.]
[Commentary:] Next, the second [part] gives a general concluding summary of the twin operation. In this there are two: first, showing the complete state; second, explaining the deficiency. This is the first. For this reason of according with principle and serving as antidotes, calming and contemplation mutually assist each other. Ordinary people, through calming, remedy attachment and give rise to vigor; the two vehicles, through calming, [dispel] cowardice and generate great compassion. This is using calming to assist in completing contemplation. If the two vehicles do not contemplate the arising and ceasing of mental activities, and ordinary people do not contemplate selflessness and impurity, they will have no means to become disgusted and detached so as to abide in calming. This is using contemplation to assist calming. Hence it is said that calming and contemplation mutually assist and complete each other.