三彌勒經疏 1.16

1.16

Question: Ānanda at that time also saw, perceived, and knew what the Tathāgata spoke; why does he not say 'I saw, perceived, and knew'? Answer: There are also three reasons. First, wishing to realize the principle, one must first hear it. Second, in this realm the Buddha's work is performed through sounds. Third, hoping to realize bodhi, one must prioritize hearing with respect. In general, for the transmitter of the Dharma, in order to make sentient beings revere, have faith in, and accept it [he says]: 'Such Dharma I heard from the Buddha; the text and meaning are definitive, with nothing added or subtracted.' Therefore [it says], 'Thus have I heard.'