“He who poses as a fool is not a fool.”

“There was never a genius who was not thought a fool until he disclosed himself; whereas he is a fool then only.”

“A woman who acts like a fool is a fool.”

“He, who will not reason, is a bigot; he, who cannot, is a fool; and he, who dares not, is a slave.”

“A man who trusts everyone is a fool, and a man who trusts no one is a fool. We are all fools, if we live long enough.”

“He was a fool,” said Willow calmly to Klein. “There are many who refuse their responsibilities. Fooling themselves they search for a ‘higher ideal’. He was a fool.”
“What are responsibilities?” said Klein laconically. “He knows. Responsibility, my dear, is another word for self-interest. For survival.”

“The man who asks a question is a fool for a minute, the man who does not ask is a fool for life.”

“The fool doth think he is wise, but the wise man knows himself to be a fool.”

“The fool doth think he is wise, but the wise man knows himself to be a fool.”

“Nobody's easier to fool, than the person who is convinced that he is right.”