He's one of the teachers, there's a few, sent by Heaven, to help us along. Died twice, both times cancer, and the last time he was chucked back into the brew, armed with a number of lessons to pass onto us. He is chopping wood and carrying water and he shows, eruditely, explicitly and articulately, that the examined life is the one worth living.

Edit: comments about no evidence and speculation show superficial exposure to Clif's work.