"...LET THERE BE LIGHT..."
The very last images of ANH are of the conflict that must continue between Luke and Vader, and then of Luke and Han aproaching as heroes on equal terms to stand before Leia.
The final glimpses of ESB reveal the true nature of the dilemma between father and son, and then the broken trio yearning to find a way to reunite in harmony.
The conclusion of ROTJ presents the resolutions to both conflicts. The nature of the entire OT is reflected backwards. All is realized. It will become what it was meant to be.