“Sometimes a pessimist is only an optimist with extra information.”

“To the optimist, pessimists are neurotic; to the pessimist, optimists are deluded.”

David H. Levy (1948) Canadian astronomer

“Optimists and pessimists differ only on the date of the end of the world.”

Stanisław Jerzy Lec book Unkempt Thoughts

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

George Bernard Shaw (1856–1950) Irish playwright

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

Oscar Wilde (1854–1900) Irish writer and poet

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

Gladys Bronwyn Stern (1890–1973) British writer

“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.”

Albert Schweitzer (1875–1965) French-German physician, theologian, musician and philosopher

“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.”

Robert A. Heinlein (1907–1988) American science fiction author

“The optimist sees the donut, the pessimist sees the hole.”

Oscar Wilde (1854–1900) Irish writer and poet

“A stumbling block to the pessimist is a stepping-stone to the optimist.”

Eleanor Roosevelt (1884–1962) American politician, diplomat, and activist, and First Lady of the United States