Not to sound too much like your father, but I really think you need a timeout.

Malcolm

I'm pulling the oxygen out of your bodies molecule by molecule, but there's good news. I'm not going to kill you. Well, not right now at least. Instead, I'm going to regain control of Rubicon that way when the whole world goes all Dr. Strangelove, you can feel your skin melt from armageddon.

Darhk

Diggle: He's not human anymore.
Darhk: Oh, I'm still human. Just better.

The President asked me if the fate of the world was resting in the hands of an IT girl, a criminal, and two guys dressed in Halloween costumes.

Lyla

What is it with you? Why are you always at the mercy of some guy? You can make your own decisions, Thea. You're not a pawn. You're a Queen.

Lonnie Machin

Oliver, you're the last person on earth to lecture someone about lying to the people they love.

Diggle

Do you remember what you told me? It takes a monster to kill a monster.

Flashback Oliver

Donna: I may not be in Mansa, but I know how to read, sweetie.
Lance: I think it's Mensa, actually.

Predictability is your flaw too. Every time my life starts to suck, you show up.

Thea

Tell me. How's it feel knowing you have no problem pulling the trigger to protect a bunch of Afghans you never knew, but you don't have the guts to do what's necessary to protect your wife and child?

Andy

Diggle: Andy told me that Genesis is coming.
Felicity: I don't think so. Phil Collins said they'd never tour again.

I had to put him down.

Diggle

Arrow Season 4 Quotes

Oliver: Felicity, wanna play a game?
Felicity: What game are we playing?
Oliver: We're playing the "reason you know so much about these ghosts is beause you've been helping the team behind my back" game.

Laurel: We need the Arrow.
Oliver: The Arrow's dead.
Laurel: We're hoping that's not the case. We're hoping that you can't change who you are in your bones.