" Religions, which condemn the pleasures of sense, drive men to seek the pleasures of power. Throughout history power has been the vice of the ascetic. "
" When two men of science disagree, they do not invoke the secular arm; they wait for further evidence to decide the issue, because, as men of science, they know that neither is infallible. But when two theologians differ, since there are no criteria to which either can appeal, there is nothing for it but mutual hatred and an open or covert appeal to force. "
" The harm that theology has done is not to create cruel impulses, but to give them the sanction of what professes to be lofty ethic, and to confer an apparently sacred character upon practices which have come down from more ignorant and barbarous times. "
" One is often told that it is a very wrong thing to attack religion, because religion makes men virtuous. So I am told; I have not noticed it. . . . You find this curious fact, that the more intense has been the religion of any period and the more profound has been the dogmatic belief, the greater has been the cruelty and the worse has been the state of affairs. "
" I've examined all the arguments for the existence of God, and none of them seem to me to be logically valid. "