Western liberal humanism is not something that comes naturally to us: like an appreciation of art or poetry, it has to be cultivated. Humanism is itself a religion without God-not all religions, of course, are theistic. Our ethical secular ideal has it's own disciplines of mind and heart and gives people the means of finding faith in the ultimate meaning of human life that were once provided by the more conventional religions.
A History of God: The 4,000-Year Quest of Judaism, Christianity and Islam (ed. Ballantine Books, 2011) - ISBN: 9780307798589