there really are no fixed natures and natural ends in the world, no formal and final causes, then nothing could naturally point beyond itself to anything else. In fact, the material world points beyond itself to God; but the secularist sees only the material world. The material side of human nature points beyond itself to an immaterial and immortal soul; the secularist sees only the brain and body. The sexual act points beyond itself to marriage and family; the secularist sees only the sexual act. And so on, and on and on. What else can one say? It’s the moon, stupid.
