We are now in a position to understand how far Epicurus was justified in regarding the expectation of immortality as a source of dread rather than of consolation. In this respect also, the survival of the fittest has determined that human nature shall not look forward with satisfaction to the termination of its earthly existence. Were any race of men once persuaded that death is the passage to a happier world, it would speedily be replaced by competitors holding a belief better adapted to the conditions of terrestrial duration. Hence, practically speaking, the effect of religious dogmas has been to make death rather more dreaded than it would have been without their aid; and, as already observed, their natural tendency has been powerfully stimulated by the cupidity of their professional expositors. The hope of heaven, to exist at all, must be checked by a considerably stronger apprehension of hell. There is a saying in America that the immortality of the soul is too good to be true. We suspect that the immortality in which most religious Americans still believe hardly deserves such a compliment; but it accurately expresses the incredulity with which a genuine message of salvation would be received by most men; and this explains why Universalism, with the few who have accepted it, is but the transition stage to a total rejection of any life beyond the grave. No doubt, in the first flush of fanaticism, the assurance of an easy admission to paradise may do much to win acceptance for the religion which offers it; but when such a religion ceases to make new conquests, its followers must either modify their convictions, or die out under the competition of others by whom mortal life is not held so cheap. We must add, that while Epicurus was right in regarding the beliefs entertained about a future life as a source of painful anxiety, he was only justified in this opinion by the deeper truth, which he ignored, that they are simply the natural dread of death under another form.[178] The most appalling pictures of damnation would, taken by themselves, probably add but little to human misery. The alarming effect even of earthly punishments is found to depend on their certainty much more than on their severity; and the certainty of suffering what nobody has ever experienced must be small indeed. Besides, the class most interested in enlarging on the dark side of immortality are also interested in showing that its dangers may be bought off at a comparatively trifling cost. What Epicurus said about the inexorable fate of the physicists might here be turned against himself. He removed terrors which there was a possibility of exorcising, and substituted a prospect of annihilation whence there was no escape.[179]