大方廣圓覺修多羅了義經略疏 2.875

2.875

賊若在外猶可隄防，養之為兒如何撿慎？又知賊是賊，賊無能為；認之為兒，寧免破敗？以喻六根取境猶可制禦，藏識妄我難以辨明，故如來藏中功德之寶念念衰耗，由此貧窮難集福智。

If a thief is outside, one can still guard against him; if one raises him as a son, how can one be vigilant? Furthermore, knowing a thief is a thief, the thief can do nothing; mistaking him for a son, how could one avoid ruin? This is an analogy for the six sense-bases seizing objects being still restrainable, whereas the false self in the storehouse consciousness (ālaya-vijñāna) is difficult to distinguish. Therefore, the jewel of merit in the tathāgatagarbha degenerates and wanes thought after thought; hence being destitute, it is difficult to gather merit and wisdom.