“If you make a mistake and do not correct it, this is called a mistake.”

“Be not ashamed of mistakes and thus make them crimes.”

“If I understand Change, I shall make no great mistake in Life”

“If names be not correct, language is not in accordance with the truth of things.”

“The Man who says he can, and the man who says he can not.. Are both correct”

“If I am walking with two other men, each of them will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself.”

“When you know a thing, to hold that you know it; and when you do not know a thing, to allow that you do not know it--this is knowledge.”