You know Oliver, somebody once told me that secrets have weight. The more you keep, the harder it is to keep moving.

You're like a dope fiend who thinks he can deal with his own addiction by making another addict go straight.

Diggle [to Oliver]

Felicity: Guess what I majored in. Hint - not the secretarial arts!
Oliver: Felicity! If I'm going to be Oliver Queen, CEO, the I cannot very well travel down 18 floors every time you and I need to discuss how we spend out nights.
Felicity: And I love spending the night with you...three...two...one. I worked very hard to get where I am and it wasn't so I could fetch you coffee!
Diggle: Well, it could be worse. My secret identity is his black driver.

Oliver: John, I don't want to die down here.
Diggle: So don't, Oliver.

Diggle: What did you want?
Felicity: Is that any way to treat a girl who just walked up six flight of stairs?
Diggle: No, it's not. Welcome.

Diggle: Find what you're looking for?
Oliver: Took down three Vertigo pushers tonight, Diggle. Last one finally knew a name. The Count.
Diggle: The Count. That's worse than The Hood.

Felicity: Where are we going to get our hands on a rare Spanish antiquity?
Diggle: You really have no idea how rich his family is, do you?

So Laurel's on her own against a murderer who burns people alive?

Oliver: We're late.
Diggle: The good news is you get to make your dramatic entrance.
Oliver: Oh I'm just glad Oliver Queen has a reputation for showing up late.
Diggle: You know, I've been meaning to tell you it really wears me out no end the way you refer to yourself in the third person like that.

I take back every joke I made about you sticking a tracking device in your boot.

Diggle: Woah. That's a neat trick. You gonna teach me that someday?
Oliver: No.

I think you didn't have a problem with Felicity’s performance until she met Barry Allen.

Arrow Quotes

Every warrior must learn the simple truth -- that pain is inevitable and suffering is optional.

Malcolm

There are people in this world who deal only in extremes. It's naive to think that anything less than extreme measures will stop them.

Amanda