I am watching Star Wars (all 6) and for the first time have a slight idea of who all those creatures are in the movies. In Episode III, Anakin Skywalker turned to the dark side and beame a Dark Lord of the Sith in the hope of saving his love from death, of becoming the most powerful, of becoming the master of the universe. Well, a Sith might be powerful but with the dark side, he is afraid of death. A Sith can reverse the natural course of things (anti-Taosim approach) but cannot prevent his own death (ironic, the Emperor says). When a Sith fights a Jedi of equal power, a Jedi is selfishless and unafraid of death, so he can never loses. Someone as bright as Anakin Skywalker must have known this all along during his Jedi training. He must have seen how at peace a Jedi can be with the world. Yet he never understood how he could be one of them, because he had memory of his mother's suffering and he wanted to avoid the suffering of his wife. Therefore it was only his fate that he could not be a true Jedi. Not his fault. The two sides of the force always exist and each person in the universe has to fulfill his own destiny. It is only that the ones on the dark side can't gain ultimate freedom.

If Anakin Skywalker knows all these and still chooses the dark side, then he is free. Why do I stress freedom? Because I found this Sith Code below, and freedom seems to be the ultimate goal of the Sith.

The Sith Code

Peace is a lie, there is only passion.
Through passion, I gain strength.
Through strength, I gain power.
Through power, I gain victory.
Through victory, my chains are broken.
The Force shall free me.

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But then I think, to be human is to have earthly passion and fear of loss and all that. A Jedi master is no longer "human", but like a Tao master (神仙). A Sith is a more engaged "human". Anakin is given a choice, but he is not ready to be a Jedi in this life, either because he is not enlightened, or his desire and curiosity for life is too great. His masters, being older and wiser, failed to train him properly. He lived a confused life and died in passion.