What happens in Russia stays in Russia. Even when it makes no sense whatsoever.

Felicity

Oliver: You need to stay here.
Felicity: You can't just ask me to stay here.
Oliver: I'm not asking. I will come and get you when this is all over.
Felicity: No!
Oliver: Felicityyyy...
Felicity: Not unless you tell me why!
Oliver: Because I need you to be safe.
Felicity: But I don't want to be safe. I wanna be with you and the others. Unsafe.
Oliver: I can't let that happen.
Felicity: Oliver, you're not making any sense.
Oliver: Slade took Laurel because he wants to kill the woman I love.
Felicity: I know, so?
Oliver: So he took the wrong woman.
Felicity: Oh.
Oliver: I love you. Do you understand?
Felicity: Yes.

You know, I used to think the vigilante was a criminal, too. But, it seems to me he's willing to sacrifice an awful lot to help the people of city. That kind of makes him a hero, doesn't it?

Felicity

You're going to be really upset when you meet my partner.

Felicity

Sara: What do you guys think?
Felicity: Oh I think if the Huntress shows up you should totally kick her ass.

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

Malcolm

Felicity: I don't doubt that. I don't doubt that you can beat him, but I'm terrified that you won't kill him because that's not who you are anymore and I am so afraid that Ra's al Ghul is going to use your humanity against you.
Oliver: Felicity, I honestly don't know if I'm a killer anymore, but I do know two things. The first is that whoever I am, I'm someone who will do whatever, whatever it takes to save my sister.
Felicity: And the second thing?
Oliver: I love you.

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

Oliver: Are you OK?
Felicity: I guess. Old lovers have a way of opening old wounds. Lovers. Sounds creepy no matter how you say it.
Oliver: Felicity, I want you to know that whatever experiences you had to go through, I'm glad that you did to shape the person that you are today. And you know how I feel about her.

Because of the life that I lead, I just think it’s better to not be with someone that I could really care about.

Oliver

Thea: Do you have a police radio in your pocket?
Roy: No, I'm just happy to see you.

We've been calling him Deathstroke.

Waller

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.