But spontaneity is not by any means a blind, disorderly urge, a mere power of caprice. A philosophy restricted to the alternatives of conventional language has no way of conceiving an intelligence which does not work according to plan, according to a one-at-a-time order of thought. Yet the concrete evidence of such an intelligence is right to hand in our own thoughtlessly ordered bodies. For the Tao does not 'know' how it produces the universe just as we do not 'know' how we construct our brains.