妙法蓮華經玄贊 1.53

1.53

有三義：一欲證深理要先聞法，名等詮義非色等故。二此界以聲而為佛事，聲為所依名等有故。三希證菩提要聞熏習，由聞熏習成出世故。由斯經首不說「見、覺、知」，唯說「我聞」。據實于時亦見佛說，諸餘佛土以光明等而為佛事，可言見等，於此義中應生分別。

There are three reasons: First, to realize the profound principle, one must first hear the Dharma, because names and the like express meanings, whereas visible form and the like do not. Second, in this world, sound is used to perform the Buddha's work, because sound serves as the basis upon which names and so forth exist. Third, desiring to realize bodhi requires the perfuming of hearing, because it is through the perfuming of hearing that the supramundane is accomplished. For these reasons, at the head of the sūtra it does not say "seen, sensed, cognized," but only says "I have heard." In fact, at that time he also saw the Buddha speak; in other buddha-fields, light and the like are used to perform the Buddha's work, where one could say "seen" and so forth, in which sense a distinction should be made.