Our brain can do strange things when it grapples with the fact that it will cease to exist. My uneducated guess would be that his talking to the dead was one of these strange things.
Was his conversion around the same time as his illness?
Was his conversion around the same time as his illness?
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell