"A philosophy of nothingness," Barbaras writes (Being, p. 121), "is still not realized as long as it defines nothingness as pure nothingness. Nothingness is genuinely nothingness only if it is not nothingness through and through." What is it about nothingness that's not like itself, adulterated through and through? Say that silence is a way of experiencing nothingness. Has there ever been in your experience a moment of unadulterated silence? What would you want to say about it?