'How soon do you think I could begin painting?' it asked.
The Spirit broke into laughter. 'Don't you see you'll never paint at all if that's what you're thinking about? he said.
'What do you mean?' asked the Ghost.
'Why, if you are interested in the country only for the sake of painting it, you'll never learn to see the country.'
'But that's just how a real artist is interested in the country.'
'No. You're forgetting,' said the Spirit. 'That was not how you began. Light itself was your first love: you loved paint only as a means of telling about light.'
'Oh, that's ages ago,' said the Ghost. 'One grows out of that. Of course, you haven't seen my later works. One becomes more and more interested in paint for its own sake.'
'One does, indeed. I also have had to recover from that. It was all a snare. Ink and catgut and paint were necessary down there, but they are also dangerous stimulants. Every poet and musician and artist, but for Grace is drawn away from love of the thing he tells, to love of the telling till, down in Deep Hell, they cannot be interested in God at all but only in what they say about Him. For it doesn't stop at being interested in paint, you know. They sink lower--become interested in their own personalities and then in nothing but their own reputations.'
~C.S. Lewis, The Great Divorce (1946)