Contradiction? (spoilers)

Okay, I need help. There are two parts in the movie that to me seem contradictory. Can anyone explain to me how they agree?

1. The scene where Palpatine says that good is a point of view.

2. The scene where Obi-Wan says that only Sith deal in absolutes.

To me, these two scenes seem to say the exact oposite thing.

That, too, is a point of view. 🙂

They do, and this has been brought up in many many places

Oops. Sorry. I didn't see a thread anywhere.