It was Plato who rightly pointed out that experience is really a medley of changing opinions and conflicting beliefs, thereby offering contrast with the orderliness and consistency of reasoned knowledge. This is why we have to begin intellectual analysis of the world by separating the realm of sense perception from the realm of reasoned perception, as though they were entirely different. But we must not end with such an artificial separation. For in the higher stages we climb to the viewpoint which reunites them again. The Thought is then the Thing. The Appearance is then also the Real!
-- Notebooks Category 21: Mentalism > Chapter 2: The World As Mental > # 2