Star Wars: Episode III - Revenge of the Sith2005

Anakin Skywalker:
The Sith rely on their passion for their strength. They think inward, only about themselves.

Supreme Chancellor:
And the Jedi don't?

Anakin Skywalker:
The Jedi are selfless... they only care about others.

Supreme Chancellor:
Or so you've been trained to believe. Why is it, then, that they have asked you to do something you feel is wrong?

Anakin Skywalker:
I'm not sure it's wrong.

Supreme Chancellor:
Have they asked you to betray the Jedi code? The Constitution? A friendship? Your own values? Think. Consider their motives. Keep your mind clear of assumptions. The fear of losing power is a weakness of both the Jedi and the Sith. Did you ever hear the tragedy of Darth Plagueis "the wise"?

Anakin Skywalker:
No.

Supreme Chancellor:
I thought not. It's not a story the Jedi would tell you. It's a Sith legend. Darth Plagueis was a Dark Lord of the Sith, so powerful and so wise he could use the Force to influence the midichlorians to create life... He had such a knowledge of the dark side that he could even keep the ones he cared about from dying.

Anakin Skywalker:
He could actually save people from death?

Supreme Chancellor:
The dark side of the Force is a pathway to many abilities some consider to be unnatural.

Anakin Skywalker:
What happened to him?

Supreme Chancellor:
He became so powerful... the only thing he was afraid of was losing his power, which eventually, of course, he did. Unfortunately, he taught his apprentice everything he knew, then his apprentice killed him in his sleep. Plagueis never saw it coming. It's ironic he could save others from death, but not himself.

Anakin Skywalker:
Is it possible to learn this power?

Supreme Chancellor:
Not from a Jedi.