Darth Sidious: The natural talent these children possess is too great to be wasted by the Jedi. I foresee an army of Force-talented spies in my service, trained in the dark side to peer into every corner of the galaxy from afar, and my enemies would be helpless against such vision.
Darth Vader: Where is Padmé? Is she safe? Is she all right?
Emperor Palpatine: It seems, in your anger, you killed her.
Darth Vader: I? I couldn't have. She was alive. I felt it! Nooo!
Palpatine: Become my apprentice. Learn to use the dark side of the Force.
Anakin Skywalker: I will do whatever you... ask. Just help me save Padmé's life. I can't live without her.
Palpatine: To cheat death is a power only one has achieved, but if we work together I know we can discover the secret.
Anakin Skywalker: I pledge myself to your teachings.
Palpatine: Good. Good. The Force is strong with you. A powerful Sith you will become. Henceforth you shall be known as Darth... Vader.
Palpatine (to Anakin): If one is to understand the great mystery, one must study all its aspects. Not just the dogmatic narrow view of the Jedi. If you wish to become a complete and wise leader, you must embrace a larger view of the Force. Be careful of the Jedi, Anakin. Only through me can you achieve a power greater than any Jedi. Learn to know the dark side of the Force and you will be able to save your wife from certain death.
Palpatine (to Anakin): Darth Plagueis was a dark lord of the Sith so powerful and so wise, he could use the Force to influence the midi-chlorians to create life. He had such a knowledge of the dark side he could even keep the ones he cared about from dying.
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.
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...