He was an eminent Jedi Knight turned Dark Lord of the Sith until, stripped of his true persona, he returned to the crumbling Jedi Order and helped defeat the Sith Empire he had established. Revan, renowned as the Revanchist, dreaded as the Sith Lord Darth Revan, and honored as the Prodigal Knight, is one of the central protagonists of the Star Wars Old Republic era. ~ Revan explains his philosophies of the Dark Side. That is why those who serve the light are limited in what they accomplish. The teachings of the Jedi are focused on fighting and controlling this transformation. You must seek power above all else, with no reservation or hesitation. The dark side offers power for power's sake. To understand this is to understand the underlying philosophy of the Sith. Those who use the dark side are also bound to serve it.