Never let someone who says it cannot be done interrupt the person who is doing it.
Never let your sense of morals prevent you from doing what is right. -- Salvor Hardin, "Foundation"
Never look a gift horse in the mouth. -- Saint Jerome
Never look up when dragons fly overhead.
Never make anything simple and efficient when a way can be found to make it complex and wonderful.
Never offend people with style when you can offend them with substance. -- Sam Brown, "The Washington Post", January 26, 1977
Never offend with style when you can offend with substance.
Never pay a compliment as if expecting a receipt.
Never play pool with anyone named "Fats".
Never promise more than you can perform. -- Publilius Syrus