The point of the show being confused about its themes and messages is spot on. Its why it feels so...dissonent. Nothing flows together. You also have constant interviews trying to explain stuff because the show didn't cover it.
It is hard to look in the minds of crazy people, but I think this chant was made after making twins main characters in this show, so: - the power of one as siths understand it, remember those people think evil is cool, siths are cool, so palpatine said something about it to anakin - the power of two as this show was about twins - the power of many as coven used their powers to possess some dog-dude and trinity killed them all with exorcism, so they lived together and died together I didn't watch it, because I don't care about SW, but it is pretty entertaining to watch youtube videos about dumbster fires, so I basicly know whole show