大般涅槃經疏 20.13

20.13

「爾時世尊」下，第二歎答。舊云稱歎，此非是答。今明亦是答，其以定相難佛，明幻等豈可得定，眾疑皆息，是為歎答。琉璃光，光來非青見青、非黃見黃，豈非不聞而聞？即是瑞答。後琉璃光答問，即兼答德王無疑為眾興問。凡此三答，三答三根釋然。河西亦言：歎是總答，下別答。

From "At that time, the World-Honoured One..." downward is the second [part], replying with praise. Traditionally it was said that this is praise, not a reply. Now it is explained that it is also a reply: because he challenged the Buddha with fixed characteristics, [the Buddha] clarified that things such as illusions can hardly be grasped as fixed, whereupon the doubts of the assembly were all laid to rest; this is a reply through praise. As for Liúlíguāng (Vaiḍūryaprabha): when the light came, it was not blue yet blue was seen, and not yellow yet yellow was seen; is this not hearing what is not heard? This is a reply through an auspicious sign. Afterwards, when Liúlíguāng answered the question, it simultaneously answered Déwáng's raising of questions for the sake of the assembly though he had no doubt himself. All together there are these three replies, and through the three replies the three capacities were released [from doubt]. Héxī also said: the praise is a general reply, while what follows is a specific reply.