Diggle: Where ya goin'?
Oliver: To give a friend the benefit of the doubt.

So, the secret society gets a new member.

Roy: Does this group have a name, like "Team Arrow" or something?
Oliver: We don't call ourselves that.
Felicity: I do. Occasionally.
Oliver: Stop.
Diggle: Welcome aboard.

Felicity: This isn't about them being together. This is about me, K? Sara can analyze blood, she can kick ass, she can do anything. And the one I'm supposed to be good at I'm failing at miserably. Why do you even need me now that you have her?
Diggle: Because you're irreplaceable Felicity.

Diggle: Who is that?
Sara: His name is Slade Wilson and unless we stop him he's going to kill Oliver and his entire family.

Diggle: A girl needs her father.
Deadshot: No, not this father. The best thing I can do for her life? Not be in it.

Last night the man who killed my brother showed more character than the woman charged with protecting the world. Good and bad is not so clear to me. One thing I do know for sure, black and white, is that I can't ever lose you again.

Diggle: I can't let you out of my sight. And you're sick of seeing me wherever you go so; lurking seemed like a good compromise.
Thea: Yeah well, it's not.

Keep this up and there will be two kinds of criminals left in Starling City. The ones we put away and the ones running scared.

Diggle: You love her. You even told her so.
Oliver: I was trying to fool Slade.
Diggle: Yes. Except now the only person you're fooling is yourself.

Diggle: Oliver you'd be dead ten times over if it wasn't for me!!!
Oliver: You're right. But this is my crusade and this is my decision.

Listen, Sara was my friend, too and if you think you're going after her alone you couldn't possibly be more wrong.

Arrow Quotes

I thought you took that book off your father's dead body. How could he have been so chatty?

Diggle

She was my sister. I couldn't be angry because she was dead. I couldn't grieve because I was so angry, that's what happens when your sister dies while screwing your boyfriend.

Laurel