“For optimists, human life never needs justification, no matter how much hurt piles up, because they can always tell themselves that things will get better. For pessimists, there is no amount of happiness—should such a thing as happiness even obtain for human beings except as a misconception—that can compensate us for life’s hurt. As a worst-case example, a pessimist might refer to the hurt caused by some natural or human-made cataclysm. To adduce a hedonic counterpart to the horrors that attach to such cataclysms would require a degree of ingenuity from an optimist, but it could be done. And the reason it could be done, the reason for the eternal stalemate between optimists and pessimists, is that no possible formula can be established to measure proportions and types of hurt and happiness in the world. If such a formula could be established, then either pessimists or optimists would have to give in to their adversaries.”

“The point that in the absence of birth nobody exists who can be deprived of happiness is terribly conspicuous. For optimists, this fact plays no part in their existential computations. For pessimists, however, it is axiomatic. Whether a pessimist urges us to live “heroically” with a knife in our gut or denounces life as not worth living is immaterial. What matters is that he makes no bones about hurt being the Great Problem it is incumbent on philosophy to observe. But this problem can be solved only by establishing an imbalance between hurt and happiness that would enable us in principle to say which is more desirable—existence or nonexistence. While no airtight case has ever been made regarding the undesirability of human life, pessimists still run themselves ragged trying to make one. Optimists have no comparable mission. When they do argue for the desirability of human life it is only in reaction to pessimists arguing the opposite, even though no airtight case has ever been made regarding that desirability. Optimism has always been an undeclared policy of human culture—one that grew out of our animal instincts to survive and reproduce—rather than an articulated body of thought. It is the default condition of our blood and cannot be effectively questioned by our minds or put in grave doubt by our pains. This would explain why at any given time there are more cannibals than philosophical pessimists.”

“The difference between an optimist and a pessimist? An optimist laughs to forget but a pessimist forgets to laugh.”

“Perhaps the greatest strike against philosophical pessimism is that its only theme is human suffering. This is the last item on the list of our species’ obsessions and detracts from everything that matters to us, such as the Good, the Beautiful, and a Sparking Clean Toilet Bowl. For the pessimist, everything considered in isolation from human suffering or any cognition that does not have as its motive the origins, nature, and elimination of human suffering is at base recreational, whether it takes the form of conceptual probing or physical action in the world—for example, delving into game theory or traveling in outer space, respectively. And by “human suffering,” the pessimist is not thinking of particular sufferings and their relief, but of suffering itself. Remedies may be discovered for certain diseases and sociopolitical barbarities may be amended. But those are only stopgaps. Human suffering will remain insoluble as long as human beings exist. The one truly effective solution for suffering is that spoken of in Zapffe’s “Last Messiah.” It may not be a welcome solution for a stopgap world, but it would forever put an end to suffering, should we ever care to do so. The pessimist’s credo, or one of them, is that nonexistence never hurt anyone and existence hurts everyone. Although our selves may be illusory creations of consciousness, our pain is nonetheless real.”

“Pessimists are usually right and optimists are usually wrong but all the great changes have been accomplished by optimists.”

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

“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.”