首楞嚴義疏注經 6.300

6.300

見聞覺知之聞，隨聲而有，非本然性。如上文云「如汝今者承聽我法，此即因聲而有分別」等。若能離緣觀性，聞相不起，動靜境亡，能所不拘，故名解脫。縛既無得，脫亦不名。一根既然，六根皆爾。

The hearing of seeing, hearing, sensing, and knowing exists following sound; it is not the original nature. As the text above says: 'Just as you now listen to my Dharma, this is having discrimination because of sound,' and so forth. If one can leave conditions and contemplate the nature, the appearance of hearing does not arise, the realms of movement and stillness vanish, and one is not bound by subject and object; hence it is called liberation. Once bondage cannot be found, liberation cannot be named either. Since one faculty is like this, all six faculties are as well.