You may get rid of every object of thought and, seemingly, of every thought itself until there is only a void. But even then you will still be thinking the void and consequently holding a "thought." It will not be the true void. The thinking "I" must itself be eliminated. Only when this is done will all activity truly cease and the stillness of the Eternal be truly known. This can be realized by some kind of mystical practice only and not by conceptual effort.
-- Notebooks Category 19: The Reign of Relativity > Chapter 5: The Void As Metaphysical Fact > # 24