A pessimist is a man who has been compelled to live with an optimist. Elbert G Hubbard
The optimist sees opportunity in every danger; the pessimist sees danger in every opportunity. Winston Churchill.
No pessimist ever discovered the secret of the stars or sailed an uncharted land, or opened a new doorway for the human spirit. Helen Keller
I’m a pessimist because of intelligence, but an optimist because of will. Antonio Gramsci
Both optimists and pessimists contribute to the society. The optimist invents the aeroplane, the pessimist the parachute. George Bernard Shaw