The Infinite throws out the elected invention

From That Hideous Strength:

To those high creatures whose activity builds what we call nature, nothing is "natural." From their station the essential arbitrariness (so to call it) of every actual creation is ceaselessly visible; for them there are no basic assumptions: all springs with the wilful beauty of a jest or a tune from that miraculous moment of self-limitation wherein the Infinite, rejecting a myriad possibilities, throws out of himself the positive and elected invention.