If you want to go more in depth on what is going on in RoP Emergency Awesome is pretty great at it.
If you haven't watched S1 there's spoilers in both videos below.
Also I linked to my post because the critic mentioned in the linked thread was having an absolute meltdown over the opening line which was.
"Nothing is evil in the beginning. And there was a time when the world was so young, there had not yet been a sunrise."
I linked to an episode of Emergency Awesome where he explains the sunrise line which based on the explanation the line doesn't really seem too ridiculous to me.
Link 1 should start close to where the critic is having a meltdown.
Link 2 should start where the guy is explaining the sunrise line.