He is a great enough magician to tap our most common nightmares, daydreams and twilight fancies, but he never invented them either: he found them a place to live, a green alternative to each day's madness here in a poisoned world. We are raised to honor all the wrong explorers and discoverers - thieves planting flags, murderers carrying crosses. Let us at last praise the colonizers of dreams.

The Tolkien Reader