首楞嚴義疏注經 3.41

3.41

"Why is this? If it came from unobstructedness, smelling would be extinguished during obstruction; how could one know obstruction? If it existed due to obstruction, there would be no smelling during unobstructedness; how could sensations like fragrance and stench be made clear? If it arose from the faculty, there would certainly be neither unobstructedness nor obstruction. Thus, the mechanism of smelling originally has no own-nature. If it emerged from space, this smelling should naturally turn back to smell your nose; if space itself possesses smelling, what does that have to do with your sense entrance?"