Leaving it Behind

Can I just say that C.S. Lewis was/is a genius? This book is so amazing. This portion really struck me as I read it last night, and instantly I knew I wanted to put it up here. In this part of the story, a busload of people from hell have taken a bus trip to the edge of heaven, and each of the "ghost people" (from hell) talk to a "solid person" (from heaven) and the solid person tries to help the ghost go into the mountains where they will eventually become solid and enter into heaven like they did. The book contains many discussions between the ghosts and the solid people, which the narrator (the main character) listens to from a distance. The following is his conversation with his solid person after listening to a discussion in which the ghost's problem was that her "love" for her dead son had completely consumed her and squelched out any desire she had for God and knowing his love.

'Is there any hope for her, Sir?'
'Aye, there's some. What she calls her love for her son has turned into a poor, prickly, astringent sort of thing. But there's still a wee spark of something that's not just herself in it. That might be blown into a flame.'
'Then some natural feelings are really better than others - I mean, are a better starting-point for the real thing?'
'Better and worse. There's something in natural affection which will lead it on to eternal love more easily than natural appetite could be led on. But there's also something in it which makes it easier to stop at the natural level and mistake it for the heavenly. Brass is mistaken for gold more easily than clay is. And if it finally refuses conversion its corruption will be worse than the corruption of what ye call the lower passions. It is a stronger angel, and therefore, when it falls, a fiercer devil.'