大乘入道次第開決 1.49

1.49

加行無間此智等者。謂前剎那是加行道。即後剎那是通達是。前加行滅通達智生。是故名為加行。無間謂要前滅後念方生。不與後念而為隔礙。故前念滅名為無間。或前念滅後念即生。無別念隔名無間也。雖有二義前解為勝。

"This wisdom unhindered after preparation..." and so forth: the preceding moment is the path of preparation, and the subsequent moment is the penetration. The preceding preparation ceases, and the penetrating wisdom arises; hence it is called "preparation." "Unhindered" means that the preceding must cease before the subsequent thought can arise, offering no obstruction to the subsequent thought; hence the cessation of the preceding thought is called unhindered. Alternatively, when the preceding thought ceases, the subsequent thought immediately arises without another thought intervening; this is called unhindered. Although there are two explanations, the former interpretation is superior.