If at first you don't succeed, you may be at your level of incompetence already.
A pessimist is a man who looks both ways when he crosses the street.
The man who believes he can do it is probably right, and so is the man who believes he can't.
Scientists are still trying to produce life in the laboratory, but it shouldn't be difficult if the laboratory assistant is pretty and willing.
The cave-dweller's wife complained that he hadn't dragged her anywhere in months.
Poetry is that which is lost in translation.