The Christian religion seems to have fulfilled its great biological purpose, in so far as we are able to judge. It has led human thought to independence, and has lost its significance, therefore, to a yet undetermined extent.... It seems to me that we might still make use in some way of its form of thought, and especially of its great wisdom of life, which for two thousand years has proven to be particularly efficacious.

Psychology of the Unconscious (ed. Courier Corporation, 2003) - ISBN: 9780486424996