The man in the picture is biblical scholar and agnostic, Bart Ehrman. His story of leaving the Christian faith is well-known. His books are widely read and vigorously debated.
In my own correspondence with Ehrman I found him quite candid about doubt. He admitted that how one chooses to look at the evidence for the Bible’s reliability greatly influences what conclusion one comes to. For one scholar who came to a wholly different conclusion than Ehrman: