“You can hardly convince a man of an error in a lifetime, but must content yourself with the reflection that the progress of science is slow. If he is not convinced, his grandchildren may be.”

“Before you can inspire with emotion, you must be swamped with it yourself. Before you can move their tears, your own must flow. To convince them, you must yourself, believe.”

“Are you or aren't you convinced that weakness is a man's condition? How can you raise yourself if you haven't fallen first?”

“A reflective reading of history will show that no man ever rose to military greatness who could not convince his troops that he put them first, above all else.”

“But you can vanquish the demons only when you yourself are convinced of your own worth.”

“To convince someone of the truth, it is not enough to state it, but rather one must find the path from error to truth.”

“Every man naturally persuades himself that he can keep his resolutions, nor is he convinced of his imbecility but by length of time and frequency of experiment.”

“And one more thing: you still believe that man can be good. If that weren't the case, you wouldn't have invented all this nonsense to convince yourself otherwise.”

“How shall the murdered man convince his assassin he will not haunt him.”

“If you would convince a man that he does wrong, do right. But do not care to convince him. Men will believe what they see. Let them see.”