"The man whom Nature has appointed to do great things is, first of all, furnished with that openness to Nature which renders him incapable of being insincere! To his large, open, deep-feeling heart Nature is a Fact: all hearsay is hearsay; the unspeakable greatness of this Mystery of Life, let him acknowledge it or not, nay even though he seem to forget it or deny it, is ever present to him,—fearful and wonderful, on this hand and on that."