5) on earth, although hell is mentioned (2.3.2.

5).

The origin of world is water, as usual (2.1.8.

1).

The highest teaching is that all was _[=a]tm[=a],_ who sent forth worlds (_lok[=a]n as[r.]jata_), and formed the Person (as guardian of worlds), taking him from waters.
Hence _[=a]tm[=a],_ Praj[=a]pati (of the second-class thinkers), and _brahma_ are the same.