Anakin Skywalker: [after killing Mace Windu and in disarray] What have I done?
Darth Sidious: You are fulfilling your destiny, Anakin. Become my apprentice. Learn to use the dark side of the Force. There's no turning back now.
Anakin Skywalker: I will do whatever you ask. Just help me save Padme's life. I can't live without her. If she dies, I don't know what I will do.
Darth Sidious: To cheat death is a power only one has achieved through centuries of the study of the Force. But if we work together, I know we can discover the secret to eternal life
Anakin Skywalker: I pledge myself to your teachings. To the ways of the Sith.
Darth Sidious: Good. Good! The Force is strong with you, Anakin Skywalker. A powerful Sith you will become. Henceforth, you shall be known as Darth... Vader.
Anakin Skywalker: Thank you... my Master.
Darth Sidious: Lord Vader... rise.