We should be clear that neither genuine religious nor genuine moral impulses will ever be expressed in terms that tie the two essentially together. If you view religion as necessary for ethics, you've reduced us to the ethical level of 4 year olds. "If you follow these commandments you'll go to heaven, if you don't' you'll burn in hell" is just a spectacular version of the carrots and sticks with which you raise your children.
Beyond Belief conference (November 2006)