"Know thyself? If I knew myself, I'd run away."

"Ich kenne mich auch nicht und Gott soll mich auch davor behüten.
I do not know myself and God forbid that I should."

"If I accept you as you are, I will make you worse; however, if I treat you as though you are what you are capable of becoming, I help you become that."

"We know accurately only when we know little; with knowledge doubt increases."

"Let everyone sweep in front of his own door, and the whole world will be clean."

"Things which matter most must never be at the mercy of things which matter least."

"Entzwei' und gebeite! Tüchtig Wort;
Verein' und leite! Bess'rer Hort.
Divide and rule, a sound motto.
Unite and lead a better one."

"Treat a man as he is, he will remain so. Treat a man the way he can be and ought to be, and he will become as he can be and should be."

"Knowing is not enough; we must apply. Willing is not enough we must do."

"A man can stand anything except a succession of ordinary days."