The pessimist believes the glass is half empty and the optimist sees it as half full but the insomniac stays up all night trying to decide the answer.
This is an amusing twist on the classic expression normally used to show that any given situation can be looked at optimistically (half full) or pessimistically (half empty). The expression is so well-known that personality types are sometimes referred to as ‘glass half-full’ or ‘glass half-empty’. In other words....