What is good is “diffusive of itself”, says St. Thomas. God is too good, and therefore too “diffusive” of himself—too exuberant and squandering of his Being—to keep his secret delight to himself. The action of a divine self-outpouring is a central biblical category already at work from the first verses of Genesis: “In the beginning God created the heavens and the earth…. And the Spirit of God was moving over the face of the waters. And God said, ‘Let there be light.’” Each of these verbs—creating, moving and saying—imply a dynamic outward movement on God’s part, beyond the sphere of his own self-sufficient Being and into the void of nothingness, that he may pour himself out into what is not-God.
Meditation by Father Simeon.