Arthur Greeves was C.S. Lewis' life long best friend. I'm about to start reading a book (a very big book!) of letters they wrote to one another between the years 1914 and 1963. There is very little information about him to be found so I'm hoping the book will shed some light. What I do know is that he was an artist and was deeply religious, practicing orthodox Christianity most of his life and then latter becoming a Quaker. He was also a homosexual, which is fascinating to think that he was surely, in part, responsible for Lewis' conversation to Christianity.
So many Christians throughout America quote Lewis as if he were the 13th apostle. I think there is a lesson to be learned here in how to treat people and also that God will use whomever He pleases. These modern notions that this one sin (if that's indeed what it is -- I do not believe so) is any worse than any other is utter nonsense. Lewis himself said in his autobiography (Surprised By Joy, 1956):
Lewis' view may be a little outdated but I think he was headed in the right direction. Though, one must wonder: now that it isn't disreputable (and legally so in this country) or unmentionable, what is the current reasoning?