A Christian Account of the Rationality of Morality

On Theosis and the Trinity

Abstract

This article provides a novel solution to the problem of the rationality of morality, which I characterize as the apparent conflict between reasons to respect other persons while pursuing personal well-being. The central concern is that reason may not resolve conflicts between these moral demands. My solution draws on Christian concepts of the Trinity and theosis (the process of becoming like God). Morality’s rationality arises from theosis because theosis requires becoming like the Trinity. We cannot resemble the Trinity alone. Instead, theosis requires both individual perfection and forming a loving union with others, a union that recognizes their worth. Together, the individual and social aspects of theosis justify the rationality of morality, as individual perfection and social union are part of a single, integrated process. The Trinity and theosis form a new framework for living a rational and moral life.