首楞嚴義疏注經 3.82

3.82

「何以故？若從寤來，寐即隨滅，將何為寐？必生時有，滅即同無，令誰受滅？若從滅有，生即滅無，誰知生者？若從根出，寤寐二相隨身開合，離斯二體，此覺知者同於空花，畢竟無性。若從空生，自是空知，何關汝入？」

"Why is this? If it came from waking, sleeping would then be destroyed; what would be taken as sleeping? If it definitely exists when there is arising, then with cessation it would likewise be non-existent; who would be made to undergo cessation? If it exists from cessation, arising would then be destroyed and non-existent; who would know what arises? If it emerged from the faculty, the two marks of waking and sleeping follow the body's opening and closing; apart from these two substances, this aware and knowing one is identical to flowers in space, lacking an intrinsic nature altogether. If it were produced from space, it would naturally be space's knowing; what does that have to do with your entrance?"