THE ONENESS/THREENESS PROBLEM The central problem of the doctrine of the Trinity comes to expression in the “debate between Karl Barth and his followers on the one side and social trinitarians on the other.” Plantinga defines the problem of the oneness and threeness of God in these terms: “Suppose the divine life includes both a three and a one. What are the referents of these numbers? Three what? And one what?”4 Barth offered the controversial answer that God’s threeness consisted in “modes of being.”
Page 20