首楞嚴義疏注經 3.22

3.22

耳喻真性，手喻無明，真妄和合名塞。動念初起名勞，由念動故境現，如頭作聲。兼耳與勞下，此之動念與妄境界，能結之心所現之境，皆是菩提性中無明勞相。此中塞耳同彼直視，故亦言瞪。

The ear analogizes the true nature, the fingers analogize avidyā, and the conjunction of the true and the false is called "plugging." The initial arising of moving thoughts is called "fatigue"; because thoughts move, realms manifest, like sound made in the head. From "Both the ear and the fatigue" downward: this moving thought and the delusive realm, the mind that binds and the realm that is manifested, are all marks of fatigue born of avidyā within the nature of bodhi. Here, plugging the ears is identical to staring straight ahead, hence it is also called "staring fixedly."