金光明經文句記 4.123

4.123

三、「心處」下，明識常去還。乍出乍入者，對塵故乍出，不對即乍入。出入間關者，應法師云：「謂出入也。」亦設置之貌，《莊子》云「小智間間」，隔礙也。啄一捨一者，捨一網目，復啄一網目，隔礙難出。得論常在者，以塵對即覺故。

Third, below the words "the mind's dwelling," explaining that consciousness constantly goes and returns. "Now going out and now entering": facing an object it suddenly goes out, and when not facing it, it suddenly enters. "Going out and entering with barriers": Master Ying says: "It refers to going out and entering." It is also an appearance of being confined; Zhuangzi says "petty knowledge is hemmed in," meaning obstructed. "Pecking at one and letting go of one": letting go of one mesh of a net and pecking at another mesh of the net, obstructed and difficult to escape. That it can be spoken of as constantly present is because it immediately becomes aware when facing an object.