Oliver Queen: I didn't know, Felicity. Five years ago, I was a completely different person. And I had... no idea that something like this was even... possible. I couldn't have imagined. When you and Diggle brought me back to Starling City, I made a vow to myself that I would never let anything like the undertaking happen again.
Felicity Smoak: What's happening now is not your fault.
Oliver Queen: Yes, it is. I have failed this city. Yao Fei. Shado. Tommy. My father, my mother. All that I ever wanted to do is honor those people.
Felicity Smoak: You honor the dead by fighting. And you're not done fighting! Malcolm Merlyn, The Count, The Clock King, the Triad - everyone who is trying to hurt this city, you stopped them. And you will stop Slade.
Oliver Queen: I don't know how.
Felicity Smoak: Neither do I. But I do know two things: You are not alone. And I believe in you.
A little over a year ago, I stood right here and I remarked that I wished it wasn't just the dark times that brought us together. With all of the loss that we have suffered, I think it's important that we embrace the miracles too, and that we remember they are still possible. Welcome home, Laurel.