四分律行事鈔資持記 2.129

2.129

次科。下敘功能，而首標大用者；良由有用，方見功能；功由用彰，所以先舉。

The next section. Below, it recounts the functions, but places the great application at the head; truly because only when there is application are the functions seen; since functions are revealed through application, it is raised first.