He will arrive at the firm unshakeable conviction that there is an inward reality behind all existence. If he wishes he may go farther still and seek to translate the intellectual idea of this reality into a conscious fact. In that case the comprehension that in the quest of pure Mind he is in quest of that which is alone the Supreme Reality in this entire universe, must possess him. The mystery of Mind is a theme upon which no aspirant can ever reflect enough: first, because of its importance, and second, because of its capacity to unfold his latent spirituality. He will doubtless feel cold on these lofty peaks of thought, but in the end he will find a heavenly reward whilst still on earth. We are not saying that something of the nature of mind as we humans know it is the supreme reality of the universe, but only that it is more like that reality than anything else we know of and certainly more like it than what we usually call by the name of "matter." The simplest way to express this is to say that Reality is of the nature of our mind rather than of our body, although it is Mind transcending the familiar phases and raised to infinity. It is the ultimate being the highest state. This is the Principle which forever remains what it was and will be. It is in the universe and yet the universe is in it too. It never evolves, for it is outside time. It has no shape, for it is outside space. It is beyond man's consciousness, for it is beyond both his thoughts and sense-experience, yet all consciousness springs mysteriously out of it. Nevertheless man may enter into its knowledge, may enter into its Void, so soon as he can drop his thoughts, let go his sense-experience, but keep his sense of being. Then he may understand what Jesus meant when saying: "He that loseth his life shall find it." Such an accomplishment may appear too spectral to be of any use to his matter-of-fact generation. What is their madness will be his sanity. He will know there is reality where they think there is nothingness.
-- Notebooks Category 28: The Alone > Chapter 2: Our Relation To the Absolute > # 100
-- Perspectives > Chapter 28: The Alone > # 14