Without keeping steadily in view this original mentalness of things and hence their original oneness with self and Mind, the mystic must naturally get confused if not deceived by what he takes to be the opposition of Spirit and Matter. The mystic looks within, to self; the materialist looks without, to world. And each misses what the other finds. But to the philosopher neither of these is primary. He looks to that Mind of which both self and world are but manifestations and in which he finds the manifestations also. It is not enough for him to receive, as the mystic receives, fitful and occasional illuminations from periodic meditation. He relates this intellectual understanding to his further discovery got during mystical self-absorption in the Void that the reality of his own self is Mind. Back in the world once more he studies it again under this further light, confirms that the manifold world consists ultimately of mental images, conjoins with his full metaphysical understanding that it is simply Mind in manifestation, and thus comes to comprehend that it is essentially one with the same Mind which he experiences in self-absorption. Thus his insight actualizes, experiences, this Mind-in-itself as and not apart from the sensuous world whereas the mystic divides them. With insight, the sense of oneness does not destroy the sense of difference but both remain strangely present, whereas with the ordinary mystical perception each cancels the other. The myriad forms which make up the picture of this world will not disappear as an essential characteristic of reality nor will his awareness of them or his traffic with them be affected. Hence he possesses a firm and final attainment wherein he will permanently possess the insight into pure Mind even in the midst of physical sensations. He sees everything in this multitudinous world as being but the Mind itself as easily as he can see nothing, the imageless Void, as being but the Mind itself, whenever he cares to turn aside into self-absorption. He sees both the outer faces of all men and the inner depths of his own self as being but the Mind itself. Thus he experiences the unity of all existence; not intermittently but at every moment he knows the Mind as ultimate. This is the philosophic or final realization. It is as permanent as the mystic's is transient. Whatever he does or refrains from doing, whatever he experiences or fails to experience, he gives up all discriminations between reality and appearance, between truth and illusion, and lets his insight function freely as his thoughts select and cling to nothing. He experiences the miracle of undifferentiated being, the wonder of undifferenced unity. The artificial man-made frontiers melt away. He sees his fellow men as inescapably and inherently divine as they are, not merely as the mundane creatures they believe they are, so that any traces of an ascetical holier-than-thou attitude fall completely away from him.
-- Notebooks Category 28: The Alone > Chapter 2: Our Relation To the Absolute > # 154
-- Perspectives > Chapter 28: The Alone > # 42