Via Daily Dharma / Correct Views:

Shunyata is “the exhaustion of all theories and views.” Making it into a metaphysical theory is like grasping a snake by the wrong end–look out! Nagarjuna emphasizes that the meaning of shunyata itself is relative: having used it to let go of other concepts, we should let go of shunyata too.

—David Loy, "The Dharma of Deconstruction"