In mysticism that love of truth which we saw as the beginning of all philosophy leaves the merely intellectual sphere, and takes on the assured aspect of a personal passion. Where the philosopher guesses and argues, the mystic lives and looks; and speaks, consequently, the disconcerting language of first-hand experience, not the neat dialectic of the schools. Hence, whilst the Absolute of the metaphysicians remains a diagram —impersonal and unattainable—the Absolute of the mystics is lovable, attainable, alive.

Mysticism: A Study in the Nature and Development of Spiritual Consciousness