Darkness or Light? Philosophy in Knights of the Old Republic.

See, I told you that all the light-side Jedi who turn to the dark side lose their power... Or maybe Obi-Wan was just stronger than his apprentice (which is quite likely). Perhaps Anakin is physically stronger than Obi-Wan, but in terms of wisdom and the use of the Force, he still has a long way to go to reach Obi-Wan's level...