Fascinating In Our Time episode on Gnosticism, The Gnostics divided the universe into two domains: the visible world and the spiritual one. They believed that a special sort of knowledge, or gnosis, would enable them to escape the evils of the physical world and allow them access to the higher spiritual realm. The Gnostics were regarded as heretics by many of the Christian Church Fathers, but their influence was important in defining the course of early Christianity. A major archaeological discovery in Egypt in the 1940s, when a large cache of Gnostic texts were found buried in an earthenware jar at Nag Hammadi, enabled scholars to learn considerably more about their beliefs.
I was first attracted by Camus, "prince of the absurd" when I was 16. Camus still fascinates me, now well beyond what would have been his 100th birthday, and 60 years after his premature death in a car crash in Burgundy (it's said that he was found with an unused train ticket in his pocket - he'd planned to go by rail to Paris to rejoin his wife and children, but had accepted at the last minute the offer of a lift from his publisher).