"The Holy Roman Empire is neither holy, nor Roman, nor an empire."

"We are all full of weakness and errors; let us mutually pardon each other our follies - it is the first law of nature."

"All sects are different, because they come from men; morality is everywhere the same, because it comes from God."

"Madness is to think that a man can do whatever he wants."

"The only way to comprehend what humanity is, is to study what it has done."