Why: whatever is the seed of all beings, that Krishna is, there is nothing, moving or unmoving, that could exist without him, closing the long list by returning to the foundational, unifying claim underneath every single example given.

In life: after a long list of specific, varied examples, it's worth returning to the single underlying principle they were all meant to illustrate, so the specifics don't get mistaken for the actual point.

Teaching: after gathering many specific insights or examples on a topic that matters to you, take time to name the single underlying principle connecting them, don't let the specifics themselves substitute for that deeper unifying understanding.