“The test of all beliefs is their practical effect in life. If it be true that optimism compels the world forward, and pessimism retards it, then it is dangerous to propagate a pessimistic philosophy.”

—  Helen Keller , book Optimism

Optimism (1903)

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Helen Keller 156
American author and political activist 1880–1968

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“Pessimism of the intellect, optimism of the will.”

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Variant: Pessimism of the spirit; optimism of the will.

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“Philosophy will not be able to effect an immediate transformation of the present condition of the world. This is not only true of philosophy, but of all merely human thought and endeavor.”

Martin Heidegger (1889–1976) German philosopher

Interview (23 September 1966), published posthumously in Der Spiegel (31 May 1976), as translated by Maria P. Alter and John D. Caputo in The Heidegger Controversy : A Critical Reader (1991), edited by Richard Wolin.
Context: Philosophy will not be able to effect an immediate transformation of the present condition of the world. This is not only true of philosophy, but of all merely human thought and endeavor. Only a god can save us. The sole possibility that is left for us is to prepare a sort of readiness, through thinking and poeticizing, for the appearance of the god or for the absence of the god in the time of foundering [Untergang] for in the face of the god who is absent, we founder. Only a God Can Save Us.

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“The essence of my optimism is constructive pessimism.”

Fausto Cercignani (1941) Italian scholar, essayist and poet

Examples of self-translation (c. 2004), Quotes - Zitate - Citations - Citazioni

Buckminster Fuller photo

“I find the audiences very excited. But then they come and say to me, "Your optimism has brushed off on me. I didn't know we had an option. I feel so much better." They say, "Your optimism." And I am not optimistic or pessimistic. I feel that optimism and pessimism are very unbalanced. I am a very hard engineer.”

Buckminster Fuller (1895–1983) American architect, systems theorist, author, designer, inventor and futurist

From 1980s onwards, Only Integrity is Going to Count (1983)
Context: I find the audiences very excited. But then they come and say to me, "Your optimism has brushed off on me. I didn't know we had an option. I feel so much better." They say, "Your optimism." And I am not optimistic or pessimistic. I feel that optimism and pessimism are very unbalanced. I am a very hard engineer. I am a mechanic. I am a sailor. I am an air pilot. I don't tell people I can get you across the ocean with my ship unless I know what I'm talking about.

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“The Optimist thinks this is the best of all possible worlds, the Pessimist fears it is true.”

Robert Oppenheimer (1904–1967) American theoretical physicist and professor of physics

This is derived from a statement of James Branch Cabell, in The Silver Stallion (1926) : The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true.
Misattributed
Variant: The optimist thinks this is the best of all possible worlds. The pessimist fears it is true.

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“The soul refuses limits, and always affirms an Optimism, never a Pessimism.”

Ralph Waldo Emerson (1803–1882) American philosopher, essayist, and poet

1840s, Essays: First Series (1841), Compensation
Context: We feel defrauded of the retribution due to evil acts, because the criminal adheres to his vice and contumacy, and does not come to a crisis or judgment anywhere in visible nature. There is no stunning confutation of his nonsense before men and angels. Has he therefore outwitted the law? Inasmuch as he carries the malignity and the lie with him, he so far deceases from nature. In some manner there will be a demonstration of the wrong to the understanding also; but should we not see it, this deadly deduction makes square the eternal account.
Neither can it be said, on the other hand, that the gain of rectitude must be bought by any loss. There is no penalty to virtue; no penalty to wisdom; they are proper additions of being. In a virtuous action, I properly am; in a virtuous act, I add to the world; I plant into deserts conquered from Chaos and Nothing, and see the darkness receding on the limits of the horizon. There can be no excess to love; none to knowledge; none to beauty, when these attributes are considered in the purest sense. The soul refuses limits, and always affirms an Optimism, never a Pessimism.
His life is a progress, and not a station. His instinct is trust. Our instinct uses "more" and "less" in application to man, of the presence of the soul, and not of its absence; the brave man is greater than the coward; the true, the benevolent, the wise, is more a man, and not less, than the fool and knave. There is no tax on the good of virtue; for that is the incoming of God himself, or absolute existence, without any comparative. Material good has its tax, and if it came without desert or sweat, has no root in me, and the next wind will blow it away. But all the good of nature is the soul's, and may be had, if paid for in nature's lawful coin, that is, by labor which the heart and the head allow. I no longer wish to meet a good I do not earn, for example, to find a pot of buried gold, knowing that it brings with it new burdens. I do not wish more external goods, — neither possessions, nor honors, nor powers, nor persons. The gain is apparent; the tax is certain. But there is no tax on the knowledge that the compensation exists, and that it is not desirable to dig up treasure. Herein I rejoice with a serene eternal peace. I contract the boundaries of possible mischief. I learn the wisdom of St. Bernard, — "Nothing can work me damage except myself; the harm that I sustain I carry about with me, and never am a real sufferer but by my own fault."

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“Optimism is an alienated form of faith, pessimism an alienated form of despair.”

Erich Fromm (1900–1980) German social psychologist and psychoanalyst

Source: The Anatomy of Human Destructiveness (1973), p. 483
Context: Optimism is an alienated form of faith, pessimism an alienated form of despair. If one truly responds to man and his future, ie, concernedly and "responsibly." one can respond only by faith or by despair. Rational faith as well as rational despair are based on the most thorough, critical knowledge of all the factors that are relevant for the survival of man.

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