"even if you appeared before me in the flesh, I would call it an hallucination"
And yet, the author does just the opposite of what he claimed he would do... I agree with the pre-heart-attack author. Can he ever be sure he isn't insane? Can I ever be sure I am not insane?
"Being a philosopher and not a poseur, I put the matter to an empirical test."
A truly awful test that could only ever gather anecdotal evidence. You earn a "D-" in science.
Maybe I missed it, but did his vision lead him to Roman Catholicism? Greek Orthodox? Anglicanism? Russian Orthodox? Episcopalian? Lutheran? Mormonism? Jehova's Witnesses?