"It is stupidity rather than courage to refuse to recognize danger when it is close upon you."

"A man always finds it hard to realize that he may have finally lost a woman's love, however badly he may have treated her."

"Data! Data! Data! I can't make bricks without clay."

"There is nothing more deceptive than an obvious fact."

"I never remember feeling tired by work, though idleness exhausts me completely."