請觀音經疏闡義鈔 2.60

2.60

經「文殊師利」，此云妙德。若見佛性，即具三德不縱不橫，故云妙德。「童子」者，內無法愛，如世童子情無欲染。「寶即」下，實智者，常住不移，寶可貴重，故表實相實智。「權」者，暫用還廢，如月盈復虧，故以月表方便權智也。「月光約智斷」者，從一日至十五日光漸漸增，譬智德。從十六至三十日光漸漸減，譬斷德。即《涅槃》月喻三昧義也。

The sūtra says "Mañjuśrī," which is translated here as Wondrous Virtue. If one sees the Buddha-nature, one then possesses the three virtues neither vertical nor horizontal; hence it is called Wondrous Virtue. "Youth": inwardly free of the love of Dharma, just as a worldly youth's feelings are without desire or defilement. From "precious is" downward: real wisdom is constantly abiding and unmoving; treasure is valuable and revered, so it represents the true mark and real wisdom. "Expedient": temporarily used and then set aside, like the moon waxing and then waning; hence the moon represents expedient, provisional wisdom. "Moonlight in terms of wisdom and severance": from the first day to the fifteenth, the light gradually increases, which illustrates the virtue of wisdom. From the sixteenth to the thirtieth, the light gradually decreases, which illustrates the virtue of severance. This is the meaning of the moon metaphor samādhi in the Nirvāṇa [Sūtra].