The creed was like a key in three respects; which can be most conveniently summed up under this symbol. First, a key is above all things a thing with a shape. It is a thing that depends entirely upon keeping its shape. The Christian creed is above all things the philosophy of shapes and the enemy of shapelessness. That is where it differs from all that formless infinity, Manichean or Buddhist, which makes a sort of pool of night in the dark heart of Asia; the ideal of uncreating all the creatures. That is where it differs also from the analogous vagueness of mere evolutionism, the idea of creatures constantly losing their shape. A man told that his solitary latchkey had been melted down with a million others into a Buddhistic unity would be annoyed. But a man told that his key was gradually growing and sprouting in his pocket, and branching into new wards or complications, would not be more gratified.
—from The Everlasting Man by G.K. Chesterton, Part Two: IV: The Witness of the Heretics