The Man in Black and Sawyer in “The Subsitute”

You're a candidate.

And what does that mean?

It means you have three choices. You can do nothing and see how it all plays out. [Marks off John Locke's name on the wall] And maybe your name will get marked off. Or you can step up and replace Jacob and be the protector of the Island.

Protect it from what?

From nothing, James. That's the real joke; there is nothing to protect it from. It's just a damn island! And it will be perfectly fine without you or me or anyone else whose lives Jacob wasted.

You said there were three choices.

The third choice is we just go. We just get the hell off this Island. Never look back. So tell me, James. Are you ready to go home.

...Hell yes.