首楞嚴義疏注經 4.517

4.517

聽精，即妄覺也。既動靜互相擊發，鼓真成妄，失真湛性，遂發聽精，卷彼聲影，結影成根，聲性虛散，故須卷攝以成聽義，既卷成根，還如卷葉。

The essence of hearing is simply false awareness. Since movement and stillness strike and arouse each other, stimulating the true into the false and losing the true still nature, it consequently generates the essence of hearing, coiling the shadow of that sound and knotting the shadow to form a faculty. Because the nature of sound is empty and diffuse, it must be coiled and gathered to accomplish the function of hearing; having coiled to form a faculty, it further resembles curled leaves.