Palpatine: The Sith and the Jedi are similar in almost every way... including their quest for greater power.
Anakin Skywalker: The Sith rely on their passion for their strength. They think inwards - only about themselves.
Palpatine: And the Jedi don't?
Anakin Skywalker: The Jedi are selfless. They only care about others.
Yoda: Careful you must be when sensing the future, Anakin. The fear of loss is a path to the dark side.
Anakin Skywalker: I won't let these visions come true, Master Yoda.
Yoda: Death is a natural part of life. Rejoice for those around you who transform into the Force. Mourn them, do not. Miss them, do not. Attachment leads to jealousy. The shadow of greed that is.
Anakin Skywalker: What must I do, Master Yoda?
Yoda: Train yourself to let go... of everything you fear to lose.
Palpatine: Good, Anakin. Good. Kill him. Kill him now.
Anakin Skywalker: I shouldn't.
Palpatine: Do it. (Anakin kills Dooku) You did well, Anakin. He was too dangerous to be kept alive.
Anakin Skywalker: Yes, but he was an unarmed prisoner. I shouldn't have done that. It's not the Jedi way.
Palpatine: It is only natural. He cut off your arm, you wanted revenge...