The spirit only can teach. Not any profane man, not any sensual, not any liar, not any slave can teach, but only he can give, who has; he only can create, who is. The man on whom the soul descends, through whom the soul speaks, alone can teach. Courage, piety, love, wisdom, can teach; and every man can open his door to these angels, and they shall bring him the gift of tongues. But the man who aims to speak as books enable, as synods use, as the fashion guides, and as interest commands, babbles. Let him hush.

Ralph Waldo Emerson