The Sith and the Jedi are similar in almost every way, including their quest for greater power.
11 seconds sound clip from the Star Wars: Episode III - Revenge of the Sith movie soundboard.
You can hear this line at 00:45:33 in the Blu-ray version of the movie.
Quote context
[...]
- I don't, uh I don't know what to say.
- Remember back to your early teachings. All who gain power are afraid to lose it. Even the Jedi.
- The Jedi use their power for good.
- Good is a point of view, Anakin.
- The Sith and the Jedi are similar in almost every way, including their quest for greater power.
- The Sith rely on their passion for their strength. They think inwards only about themselves.
- The Jedi are selfless. They only care about others.
- Did you ever hear the tragedy of Darth Plagueis the Wise?
- No.
- I thought not. It's not a story the Jedi would tell you.
[...]