I was looking at my furniture, not as the utilitarian who has to sit on chairs, to write at desks and tables, and not as the cameraman or scientific recorder, but as the pure aesthete whose concern is only with forms and their relationships within the field of vision or the picture space. But as I looked, this purely aesthetic, Cubist's-eye view gave place to what I can only describe as the sacramental vision of reality. I was back where I had been when I was looking at the flowers—back in a world where everything shone with the Inner Light, and was infinite in its significance.
describing his experiment with mescaline, p. 22. - The Doors of Perception (1954)