Philosophy, for Plato, is a kind of vision, the vision of truth. It is not purely intellectual; it is not purely wisdom, but love of wisdom. Spinozas intellectual love of God is much the same intimate union of thought and feeling. Every one who had done any kind of creative work has experienced, in a greater or less degree, the state of mind in which, after long labor, truth, or beauty, appears, or seems to appear, in a sudden glory - it may only be about some small matter, or it may be about the universe. The experience is, at the moment, very convincing; doubt may come later, but at the time there is utter certainty. I think that most of the best creative work, in art, in science, in literature, and in philosophy, had been the result of such a moment.p. 122.