The objections to religion are of two sorts - intellectual and moral. The intellectual objection is that there is no reason to suppose any religion true; the moral objection is that religious precepts date from a time when men were more cruel than they are and therefore tend to perpetuate inhumanities which the moral conscience of the age would otherwise outgrow.

Why I Am Not a Christian: And Other Essays on Religion and Related Subjects (ed. Simon and Schuster, 1957) - ISBN: 9780671203238