So if he was so damn powerful... Why was there rebels? Why couldn't he influence them? Did he believe he could live forever? Could he live forever?
You also said that was from a book right? Should have put that into a movie. It isn't really explained why the Empire was a bad thing. From what you tell me it was better to have one leader control the galaxy then for the galaxy to plung into countless wars.
Edit: Also if he was that powerful and some how couldn't control the rebels. Why didn't he just use the force to hunt them down and kill them. A whole Galaxy under his control and he couldn't stop a little rebellion?
Vast and powerful though he was, he also knew of the one person stronger than himself. At least with his advanced age, the perosn who was stronger than him. Vader's son, to blindly put himself out in the galaxy only opene dup the opportunity for SKywalker to kill him. Though as we see, it was quite in vain. He couldn't live forever, he clones himself many times though, but due to a defect in the force or the device. Or something, his life got shorter and shorter with each clone. He killed his master who did in fact discover immortality, a foolish thing to do. But he was prideful, and thought he could just as easily learn such a technique. He DID influence the rebels, why do you think so little planets rebelled. Think of how many people are on each planet, how many planets there are. The Empire is limitless, but it draws on those planets. Living during that time was probably litteraly a depressing affair with him alive. The people who rebelled are the ones for various reasons to have stronger willpower, or perhaps he wasn't omipitent enough to get everyone under his influence. Not to mention there ar eother emotions, he was a tyrant that killed many innocents. It's possible to shake his influence off. Oh the wars and stuff was only because of his corrupt system which was biased against non humans and encouraged internal politics to backstab each other. He didn't want anyone to come after him, so his own lessons backfired once he was gone. He created a litteral cult of personality. Despite hsi vast powers, he can't mind read the entire galaxy. So hunting for them would have to be done in person. Given his advanced age, it would take perhaps hundreds of years to visit every planet. Even for just a second. Not exactly efficient. Star Wars galaxy is gigantic.