His aversion to religion, in the sense usually attached to the term, was of the same kind with that of Lucretius: he regarded it with the feelings due not to a mere mental delusion, but to a great moral evil. He looked upon it as the greatest enemy of morality: first, by setting up factitious excellencies — belief in creeds, devotional feelings, and ceremonies, not connected with the good of human kind — and causing these to be accepted as substitutes for genuine virtue: but above all, by radically vitiating the standard of morals; making it consist in doing the will of a being, on whom it lavishes indeed all the phrases of adulation, but whom in sober truth it depicts as eminently hateful.
John Stuart Mill on his father
Found this quote while randomly reading stuff. It sums up beautifully and succinctly the whole of my last post.