Between the optimist and the pessimist, the difference is droll. The optimist sees the doughnut; the pessimist the hole!
Oscar Wilde
There is no sadder sight than a young pessimist.
Mark Twain
A pessimist is a man who tells the truth prematurely.
Edmond Rostand
To a profound pessimist about life, being in danger is not depressing.
F. Scott Fitzgerald