“The majority of men prefer delusion to truth. It soothes. It is easy to grasp. Above all, it fits more snugly than the truth into a universe of false appearances—of complex and irrational phenomena, defectively grasped. But though an idea that is true is thus not likely to prevail, an idea that is attacked enjoys a great advantage. The evidence behind it is now supported by sympathy, the sporting instinct, sentimentality—and sentimentality is as powerful as an army with banners. One never hears of a martyr in history whose notions are seriously disputed today. The forgotten ideas are those of the men who put them forward soberly and quietly, hoping fatuously that they would conquer by the force of their truth; these are the ideas that we now struggle to rediscover.”

“The essence of science is that it is always willing to abandon a given idea for a better one; the essence of theology is that it holds its truths to be eternal and immutable.”

“One of the most irrational of all the conventions of modern society is the one to the effect that religious opinions should be respected. …[This] convention protects them, and so they proceed with their blather unwhipped and almost unmolested, to the great damage of common sense and common decency. that they should have this immunity is an outrage. There is nothing in religious ideas, as a class, to lift them above other ideas. On the contrary, they are always dubious and often quite silly. Nor is there any visible intellectual dignity in theologians. Few of them know anything that is worth knowing, and not many of them are even honest.”

“The kind of man who wants the government to adopt and enforce his ideas is always the kind of man whose ideas are idiotic.”

“The men the American people admire most extravagantly are the most daring liars; the men they detest most violently are those who try to tell them the truth.”

“It is often argued that religion is valuable because it makes men good, but even if this were true it would not be a proof that religion is true. That would be an extension of pragmatism beyond endurance. Santa Claus makes children good in precisely the same way, and yet no one would argue seriously that the fact proves his existence. The defense of religion is full of such logical imbecilities. The theologians, taking one with another, are adept logicians, but every now and then they have to resort to sophistries so obvious that their whole case takes on an air of the ridiculous. Even the most logical religion starts out with patently false assumptions. It is often argued in support of this or that one that men are so devoted to it that they are willing to die for it. That, of course, is as silly as the Santa Claus proof. Other men are just as devoted to manifestly false religions, and just as willing to die for them. Every theologian spends a large part of his time and energy trying to prove that religions for which multitudes of honest men have fought and died are false, wicked, and against God.”

“I am wholly devoid of public spirit or moral purpose. This is incomprehensible to many men, and they seek to remedy the defect by crediting me with purposes of their own. The only thing I respect is intellectual honesty, of which, of course, intellectual courage is a necessary part. A Socialist who goes to jail for his opinions seems to me a much finer man than the judge who sends him there, though I disagree with all the ideas of the Socialist and agree with some of those of the judge. But though he is fine, the Socialist is nevertheless foolish, for he suffers for what is untrue. If I knew what was true, I'd probably be willing to sweat and strive for it, and maybe even to die for it to the tune of bugle-blasts. But so far I have not found it.”