“Don't ever become a pessimist, Ira; a pessimist is correct oftener than an optimist, but an optimist has more fun--and neither can stop the march of events.”

“Both optimists and pessimists contribute to society. The optimist invents the aeroplane, the pessimist the parachute.”

“Between the optimist and the pessimist, the difference is droll. The optimist sees the doughnut; the pessimist the hole! ”

“Both optimists and pessimists contribute to our society. The optimist invents the airplane and the pessimist the parachute.”

“To the question whether I am a pessimist or an optimist, I answer that my knowledge is pessimistic, but my willing and hoping are optimistic.”

“I'd rather be an optimist and a fool than a pessimist and right.”

“I'd rather be optimistic and wrong; than pessimistic and right.”

“There is no sadder sight than a young pessimist, except an old optimist.”

“A pessimist is a man who has been compelled to live with an optimist.”

“A pessimist is a person who has had to listen to too many optimists.”