Bhagavad Gita, Chapter 16, Verse 6

There are two types of beings in this world, the divine and the Asurika. The divine have been described at length; hear from Me, O Pârtha, of the Asurika.

A real, simple two-part framework is named here before Krishna moves into the harder half of the description.

Having already covered the divine qualities, Krishna signals plainly that the demoniac ones come next. Real structure keeps this long chapter easy to follow.