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.

So, the secret society gets a new member.

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

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

Diggle: I've just never seen you spooked like this before.
Oliver: That should tell you something.

Diggle: I think our Miss Smoak is smitten.
Oliver: Diggle, what did you find out about Mr. Allen?
Diggle: He's not who he says he is.

Diggle: Why am I getting that you know more about this than Felicity's new friend?
Oliver: Pray I'm wrong.

Felicity: Just thinking out loud, but are we sure this is the best plan we can come up with? I know Lyla's your friend, but...
Diggle: Felicity, Lyla isn't my friend. She was my wife.

Sara: Dig, you may be a three-tour special forces veteran, but I was trained by the people that make the special forces look
like a kindergarten class so step aside, or be put down.
Diggle: It's your funeral Sara.
Sara: It wouldn't be my first.

Diggle: How'd it go with your mother?
Oliver: Not well. Have you found somebody for me to hit yet?

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

Oliver, what I would like to know is what you were doing at Laurel's office in the first place. She makes you public enemy number one and you figured this was a good time to chat?

Arrow Quotes

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

Diggle

Ra's al Ghul: You tasted death and you wanted more, but the truth is everyone and everything must come to an end. Even for one such as me.
Oliver: Kill me, but spare John Diggle's life. Let him go. I will beg for it.
Ra's al Ghul: You have shown tremendous strength, fortitude, power. No, Mr. Queen. I don't want to kill you. I want you to take my place. I want you to become the next Ra's al Ghul.