I believe the teacher's work is largely negative, that it is largely a matter of saying, "This doesn't work because ..." or "This does work because ..." The because is very important. The teacher can help you understand the nature of your medium, and he can guide you in your reading.
Flannery O'ConnorEven in the life of a Christian, faith rises and falls like the tides of an invisible sea. It's there, even when he can't see it or feel it, if he wants it to be there. You realize, I think, that it is more valuable, more mysterious, altogether more immense than anything you can learn or decide upon It will keep you free - not free to do anything you please, but free to be formed by something larger than your own intellect or the intellects around you.
Flannery O'Connor