“Progress is impossible without change; and those who cannot change their minds cannot change anything.”

“Those who cannot change their minds cannot change anything.”

“Decency cannot be discussed without indecency!”

“What you are to do without me I cannot imagine.”

“He who can, does. He who cannot, teaches. ”

“You cannot have power for good without having power for evil too. Even mother's milk nourishes murderers as well as heroes.”

“Those who talk most about the blessings of marriage and the constancy of its vows are the very people who declare that if the chain were broken and the prisoners left free to choose, the whole social fabric would fly asunder. You cannot have the argument both ways. If the prisoner is happy, why lock him in? If he is not, why pretend that he is?”