“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”
“The man who is a pessimist before forty-eight knows too much; if he is an optimist after it he knows too little”
“An optimist is a person who sees a green light everywhere, while a pessimist sees only the red stoplight. . . The truly wise person is colorblind.”
“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
“A pessimist only sees the dark side of the clouds, and mopes; a philosopher sees both sides and shrugs; an optimist doesn't see the clouds at all--he's walking on them.”
Leonard L. Levinson
“The optimist sees the rose and not its thorns; the pessimist stares at the thorns, oblivious to the rose”
“Pessimism leads to weakness, optimism to power”
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