The source of our knowledge of the Divine is the same that we mentioned before when speaking of Socrates. The Mind of man contains the very essence [i.e. self-existence] in itself, and in order to acquire a knowledge of the divine, one must develop it in himself and bring it to consciousness.
—History of Philosophy, Vol. II, as quoted in The Journal of Speculative Philosophy, Vol. 4 No. 3 (1870).