n. A person who looks both ways before crossing a one-way street.
n. An optimist with experience.
An optimist stays up to see the New Year in. A pessimist waits to make sure the old one leaves.
— Bill Vaughan
Nobody kills a great idea faster than a bored pessimist.
Borrow money from pessimists – they don't expect it back.
— Steven Wright
The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true.
— Irving Caesar