首楞嚴義疏注經 3.47

3.47

舌根不動喻真性，吻喻無明，舐喻真與妄合。勞即念動，念動故境生，如甜苦淡。問：甜苦由勞故生，可喻妄境。淡是舌根不動，合喻於真，為何喻境？答：元來不動可以喻真，今以由動故顯不動，既是形待，故成妄矣。如下云「言妄顯諸真，妄真同二妄。」餘如文。

The tongue faculty not moving analogizes the true nature, the lips analogize avidyā, and licking analogizes the conjunction of the true and the false. Fatigue is the movement of thought; because thought moves, realms arise, such as sweet, bitter, and bland. Question: Sweetness and bitterness arise due to fatigue, and thus can analogize delusive realms. Blandness is the tongue faculty not moving and ought to analogize the real; why does it analogize a realm? Answer: Originally not moving can analogize the real; now, because it is revealed as not moving by means of movement, since it is a matter of relative contrast, it constitutes delusion. As it says below: "Speaking of delusion reveals the real; delusion and reality are equally two delusions." The rest is as in the text.