Dr. Hart reflects on what a flourishing world-wide Christian civilization should look like in the future. For one example of the language in Paul that Dr. Hart opens with in this lesson, see Colossians 1:16-20:

Because in him were created all things in the heavens and on earth, the visible as well as the invisible (whether Thrones or Lordships or Archons or Powers); all things were created through him and for him; And he is before all things, and all things hold together in him, And he is the head of the body, of the assembly—who is the origin, firstborn from the dead, so that he might himself hold first place in all things—For in him all the Fullness was pleased to take up a dwelling, And through him to reconcile all things to him, making peace by the blood of his cross [through him], whether the things on the earth or the things in the heavens.

From the New Testament translation by David Bentley Hart, first edition.