大乘起信論廣釋卷第三．四．五 5.38

5.38

論。又是菩薩至微細之相　釋曰。次下第二顯發心相。於中有二。初歎細標數。後列名釋相。此初也。顯此發心勝於前位。難測知故言微細相。

[Treatise:] Furthermore, these bodhisattvas […] subtle marks.
[Commentary:] Next below is the second [section], revealing the marks of arousing the mind. Here there are two: first, praising the subtlety and stating the number; second, listing the names and explaining the marks. This is the first. It reveals that this arousing of the mind surpasses the previous stations, and because it is difficult to fathom, it is spoken of as "subtle marks".