The existence of "archetypal ideas" or "divine thoughts" can be proven to exist nowhere else except in his own mind, therefore they have no more reality, no more value, and no more duration than other thoughts. The cosmic mind and his mind are ultimately one and the same. False habits of thinking cause false perception; hence he is not aware of this. The cosmic mind "created" all these ideas of objects in the universe, including the self, the "I," in the same way that a dreamer creates his own dream universe. Mind is ALL we know, all we ever shall know. To discover what colour is, he must remember that the coloured object is itself but an idea; what can the colour be save an idea also?
-- Notebooks Category 21: Mentalism > Chapter 3: The Individual and World Mind > # 87