You will be compelled to kill until you've slain the one who hurt you.

Malcolm

Diggle: We need to go.
Oliver: Where?
Diggle: Somehwhere where I'm going to try to trust you again.

Malcolm: The Pit contains traces of the souls of all the men and women who have bathed in its waters. What those waters can restore, they can also take. Life for life.
Thea: What are you saying?
Malcolm: That you need to feed this impulse, give in to it. If you do, it will subside for a time. Once you do, it will subside for a time.

OK, I know that was kind of a bust, but wasn't it fun having the original Team Arrow back together?

Felicity

Even if Sara went into the Pit, even if it worked, who -- what -- came out of the Pit, would not be Sara. Laurel, I am sorry, truly sorry, but of course, my answer is no.

Malcolm

Arrow Season 4 Episode 3 Quotes

OK, I know that was kind of a bust, but wasn't it fun having the original Team Arrow back together?

Felicity

Even if Sara went into the Pit, even if it worked, who -- what -- came out of the Pit, would not be Sara. Laurel, I am sorry, truly sorry, but of course, my answer is no.

Malcolm