I can't be a pessimist because I am alive. To be a pessimist means that you have agreed that human life is an academic matter. So, I am forced to be an optimist. I am forced to believe that we can survive, whatever we must survive.

And who is and should be a pessimist? He who is mature for death and is in no condition to love life, just as the optimist cannot turn away from it. If he does not realize that he will live on in his children, his procreation loses its horrible character; but if he does realize it, he will recoil in horror from it, just like Humboldt when he noticed that the torments that another being must endure for perhaps eighty years are too high a price to pay for a few minutes of pleasure, and will consider the procreation of children, and rightly so, as a crime.

Pessimism is a very easy way out when you’re considering what life really is, because pessimism is a short view of life. If you look at what is happening around us today and what has happened just since you were born, you can’t help but feel that life is a terrible complexity of problems and illnesses of one sort or another. But if you look back a few thousand years, you realize that we have advanced fantastically from the day when the first amoeba crawled out of the slime and made its adventure on land. If you take a long view, I do not see how you can be pessimistic about the future of man or the future of the world.

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

A pessimist is a man who thinks all women are bad. An optimist is a man who hopes they are.

A pessimist is one who makes difficulties of his opportunities and an optimist is one who makes opportunities of his difficulties.

I don't consider myself a pessimist. I think of a pessimist as someone who is waiting for it to rain. And I feel soaked to the skin.

A pessimist is somebody who complains about the noise when opportunity knocks.

A pessimist is one who, when he has the choice of two evils, chooses both.

Let pessimism once take hold of the mind, and life is all topsy-turvy, all vanity and vexation of spirit. There is no cure for individual or social disorder, except in forgetfulness and annihilation. "Let us eat, drink and be merry," says the pessimist, "for to-morrow we die." If I regarded my life from the point of view of the pessimist, I should be undone. I should seek in vain for the light that does not visit my eyes and the music that does not ring in my ears. I should beg night and day and never be satisfied. I should sit apart in awful solitude, a prey to fear and despair. But since I consider it a duty to myself and to others to be happy, I escape a misery worse than any physical deprivation.

Happy the creators of pessimistic systems! Besides taking refuge in the fact of having made something, they can exult in their explanation of universal suffering, and include themselves in it.

I don't complain about the world. I don't protest in the name of the universe. I'm not a pessimist. I suffer and complain, but I don't know if suffering is the norm, nor do I know if it's human to suffer. Why should I care to know?

I suffer, without knowing if I deserve to. (A hunted doe.)
I'm not a pessimist. I'm sad.

"What is an optimist? The man who says, "It's worse everywhere else. We're better off than the rest of the world. We've been lucky." He is happy with things as they are and he doesn't torment himself.

What is a pessimist? The man who says, "Things are fine everywhere but here. Everyone else is better off than we are. We're the only ones who've had a bad break." He torments himself continually."

Contrary to what you may assume, I am not a pessimist but an indifferentist—that is, I don't make the mistake of thinking that the resultant of the natural forces surrounding and governing organic life will have any connexion with the wishes or tastes of any part of that organic life-process. Pessimists are just as illogical as optimists; insomuch as both envisage the aims of mankind as unified, and as having a direct relationship (either of frustration or of fulfilment) to the inevitable flow of terrestrial motivation and events. That is—both schools retain in a vestigial way the primitive concept of a conscious teleology—of a cosmos which gives a damn one way or the other about the especial wants and ultimate welfare of mosquitos, rats, lice, dogs, men, horses, pterodactyls, trees, fungi, dodos, or other forms of biological energy.

A pessimist is a person who finds an oyster in a pearl.