Obi-Wan Kenobi : You have allowed this dark lord to twist your mind, until now, until now you've become the very thing you swore to destroy.

Anakin Skywalker : Don't lecture me, Obi-Wan! I see through the lies of the Jedi. I do not fear the dark side as you do. I have brought peace, freedom, justice, and security to my new Empire.

Obi-Wan Kenobi : Your new Empire?

Anakin Skywalker : Don't make me kill you.

Obi-Wan Kenobi : Anakin, my allegiance is to the Republic, to democracy!

Anakin Skywalker : If you're not with me, then you're my enemy.

Obi-Wan Kenobi : [realizing that Anakin is consumed by evil and there's no reasoning with him anymore] Only a Sith deals in absolutes.

[draws his lightsaber]

Obi-Wan Kenobi : I will do what I must.

Anakin Skywalker : You will try.

[draws his lightsaber and confronts Obi-Wan]