“As long as Sunyata is cognized by a subject it remains object.” But when the subject enters Sunyata and becomes identical with it, the subject itself is Sunyata, namely void. And when the void is really void, there is not even a cognizing subject in it.
Jung argues that sunyata, when fully realized, annihilates the cognizing subject itself, making any claim of consciousness of sunyata self-contradictory — a foundational challenge to Buddhist epistemological accounts of the state.
, Letters Volume 2, 1951-1961, 1975thesis