成唯識論演祕 1.700

1.700

有義空為聲依，聲唯現境，何故說空非現境耶？故可說空亦為現境。

One interpretation says: Space is the basis of sound, and sound is solely an object of direct perception; why is it said that space is not an object of direct perception? Therefore, one may say that space is also an object of direct perception.