All concepts are dualistic; each implies its contrary concept. We cannot think them without silently posing their counterparts: the Void and the All, the "I" and the not-Self. This is why we have to abandon dualism in the end for nondualism if we want truth. We cannot have one foot in each camp.
-- Notebooks Category 19: The Reign of Relativity > Chapter 2: The Double Standpoint > # 11