Mark Twain — "Supposing is good, but finding out is better."

"The human race has been a long time without a complete and intelligent explanation of itself. It has been content to accept the explanations of its untrained and ignorant imagination. This has resulte…"

"Giving up smoking is the easiest thing in the world. I know because I've done it thousands of times."

"Never argue with a fool. Onlookers may not be able to tell the difference."

"The trouble with the world is not that people know too little, but that they know so many things that aren't so."

"Under certain circumstances, profanity provides a relief denied even to prayer."