The evidence of religion — ah, I know where the true evidence lies, by the pleadings of my own heart against me. Why, why must it be that all these alien histories, these strange theories and doctrines, should be all sown in together in the child seed-bed with the pure grain of Christianity? so that in after years it is impossible to root them out without trampling over rudely on the good. And we must do it. They may be harmless, growing there unrecognised; but, known for what they are, their poison opens then, and they or we must die.

Letter III - The Nemesis of Faith (1849)