The uncertainty of Socrates.............

He had his own religious faith:  he believed in one God, and hoped in his modest way that death would not quite destroy him, but he knew that a lasting moral code could not be based upon so uncertain a theology.  If one could build a system of morality absolutely independent of religious doctrine, as valid for the atheist as for the pietist, then theologies might come and go without loosening the moral cement that makes of wilful individuals the peaceful citizens of a community.

-Will Durant,  The Story of Philosophy