After considering the production of creatures, we come to the consideration of the distinction of things. This consideration will be threefold -- first, of the distinction of things in general; secondly, of the distinction of good and evil; thirdly, of the distinction of the spiritual and corporeal creature.

Under the first head, there are three points of inquiry:

A1 The multitude or distinction of things.

A2 Their inequality.

A3 The unity of the world.