It would be absurd for him to deny the actuality, the living presence, of all that is happening to him in every moment of the day. They are there and they are real as experiences and he would be a fool indeed to deny them. Nor does mentalism ask him to do so. What it does say is that if he analyses the actuality of all these experiences, if he tries to trace out their beginning and end, their existence and continuity, he will discover that consciousness is their seat, that this consciousness can by profound thought be separated from its projections--the thoughts, the scenes, the objects and events, the people and the world--in short, that everything including himself is in the mind.
-- Notebooks Category 21: Mentalism > Chapter 2: The World As Mental > # 99