"Tinny"

One of the better-known quotations from C.S. Lewis' Surprised by Joy:

In reading Chesterton, as in reading Macdonald, I did not know what I was letting myself in for. A young man who wishes to remain a sound Atheist cannot be too careful of his reading. There are traps everywhere—"Bibles laid open, millions of surprises," as Herbert says, "fine nets and stratagems." God is, if I may say it, very unscrupulous.

More:

All the books were beginning to turn against me. Indeed, I must have been as blind as a bat not to have seen, long before, the ludicrous contradiction between my theory of life and my actual experiences as a reader. George Macdonald had done more to me than any other writer; of course it was a pity he had that bee in his bonnet about Christianity. He was good in spite of it. Chesterton had more sense than all the other moderns put together; bating, of course, his Christianity. Johnson was one of the few authors whom I felt I could trust utterly; curiously enough, he had the same kink. Spenser and Milton by a strange coincidence had it too. Even among ancient authors the same paradox was to be found. The most religious (Plato, Aeschylus, Virgil) were clearly those on whom I could really feed. On the other hand, those writers who did not suffer from religion and with whom in theory my sympathy ought to have been complete—Shaw and Wells and Mill and Gibbon and Voltaire—all seemed a little thin; what as boys we called "tinny." It wasn't that I didn't like them. They were all (especially Gibbon) entertaining; but hardly more. There seemed to be no depth in them. They were too simple. The roughness and density of life did not appear in their books.