Modern ethics has been shaped by two dominant philosophical assumptions: (1) that there can be no theoretical knowledge of God, i.e., denial of metaphysics, and (2) that moral claims can be redeemed independently of theistic affirmations, i.e., morality does not require theism. These assumptions have influenced much of modern theological ethics. Yet, insofar as theological ethics accepts that morality does not require any explicit or implicit religious beliefs, it affirms that a secularistic morality is possible. But this affirmation is directly (...) at odds with the essence of theism, namely, that God is the source and end of all things, including the moral life. By accepting the dominant consensus, therefore, theological ethics undermines its fundamental theistic claim. Focusing on James Gustafson's theocentric ethics, I seek to show the price that theological ethics pays for subscribing to the dominant consensus. I argue that: (1) Gustafson embraces an inconsistent self-understanding, which undermines his theocentric claim, (2) this is due to his dismissal of metaphysics, and (3) his theocentric ethic would be more compelling if formulated in terms of Whitehead's process metaphysics. (shrink)