From The Argument from Desire:
"The conclusion of the argument is not that everything the Bible tells us about God and life with God is really so. What it proves is an unknown X, but an unknown whose direction, so to speak, is known. This X is more: more beauty, more desirability, more awesomeness, more joy. This X is to great beauty as, for example, great beauty is to small beauty or to a mixture of beauty and ugliness. And the same is true of other perfections.
But the "more" is infinitely more, for we are not satisfied with the finite and partial. Thus the analogy (X is to great beauty as great beauty is to small beauty) is not proportionate. Twenty is to ten as ten is to five, but infinity is not to twenty as twenty is to ten. The argument points down an infinite corridor in a definite direction. Its conclusion is not "God" as already conceived or defined, but a moving and mysterious X which pulls us to itself and pulls all our images and concepts out of themselves."