"Duties are not performed for duty's sake, but because their neglect would make the man uncomfortable. A man performs but one duty - the duty of contenting his spirit, the duty of making himself agreeable to himself."

Mark Twain (1835–1910)

"It often happens that I wake up at night and begin to think about a serious problem and decide I must tell the Pope about it. Then I wake up completely and remember that I am the Pope."

Pope John XXIII (1881–1963)

"Never let your sense of morals get in the way of doing what's right."

Issac Asimov (1920–1992)