Never say no. A man can be happy with any woman as long as he doesn't love her. Never stand between a fire hydrant and a dog. Smile, it makes people wonder what you are thinking. You can never tell which way the train went by looking at the track.
Logic is a systematic method of coming to the wrong conclusion with confidence.
Whenever a system becomes completely defined, some damn fool discovers something which either abolishes the system or expands it beyond recognition. Technology is dominated by those who manage what they do not understand. If builders built buildings the way programmers wrote programs, then the first woodpecker that came along would destroy civilization. An expert is one who knows more and more about less and less until he knows absolutely everything about nothing. All great discoveries are made by mistakes.