Thanos: In all my years of conquest, violence, slaughter, it was never personal. But I'll tell you now, what I'm about to do to your stubborn, annoying little planet... I'm gonna enjoy it. Very, very much.
Stan Lee: Hey, man! Make love, not war!
Steve Rogers: Hail Hydra.
Pepper Potts: We got really lucky.
Tony Stark: Yeah. I know.
Pepper Potts: A lot of people didn't.
Tony Stark: I can't help everybody.
Pepper Potts: It sort of seems like you can.
Tony Stark: Not if I stop. I can put a pin in it right now. And stop.
Pepper Potts: Tony, trying to get you to stop has been one of the failures of my entire life.
Thanos: I will shred this universe down to its last atom, and then, with the stones you've collected for me, create a new one.
Tony Stark: What we needed was a suit of armor around the world! Remember that? Whether it impacted our precious freedoms or not, that's what we needed!
Steve Rogers: Well, that didn't work out, did it?
Tony Stark: I said we'd lose. You said, "we'll do that together too." Guess what, Cap? We lost, and you weren't there. But that's what we do, right? Our best work after the fact? We're the Avengers? Not the Prevengers, right?
Thor: Mother, I have to tell you something...
Frigga: No, son, you don't. You're here to repair your future - not mine.
Rocket: You think you're the only one that lost people? What do you think we're doin' here? I lost the only family I ever had. Quill, Groot, Drax, the chick with the antenna - all gone! I get that you miss your mom. But she's gone - *really* gone. And there are plenty of people who are only *kinda* gone. And you can help them.
Tony Stark: Did she have any family?
Steve Rogers: Yeah. Us.
Bruce Banner: If we do this, how do we know it's going to end any differently than it did before?
Carol Danvers: Because before, you didn't have me.
James Rhodes: Hey, new girl? Everybody in this room is about that superhero life. And, if you don't mind my asking, where the hell have you been all this time?
Carol Danvers: There are a lot of other planets in the universe, and, unfortunately, they didn't have you guys.
Tony Stark: What's wrong with him?
Rocket: He's pissed. Thinks he failed. Which, of course he did, but you know, there's a lot of that going around, ain't there?
Steve Rogers: You know, I saw a pod of whales when I was coming in, over the bridge.
Natasha Romanoff: In the Hudson?
Steve Rogers: Fewer ships, cleaner water...
Natasha Romanoff: You know, if you're about to tell me to look on the bright side - I'm about to hit you in the head with a peanut butter sandwich.
Steve Rogers: Sorry, force of habit.
Rocket: Who hasn't been to space? You better not throw up on my ship!
Dr. Stephen Strange: If I tell you what happens, it won't happen.
Natasha Romanoff: This is gonna work, Steve.
Steve Rogers: I know it is. 'Cause I don't know what I'm gonna do if it doesn't.
Steve Rogers: Avengers! ...Assemble.
Gamora: This is the one? Seriously?
Nebula: The choices were him or a tree.
Tony Stark: No amount of money ever bought a second of time.
Steve Rogers: I can do this all day.
Steve Rogers: Yeah, I know.
Natasha Romanoff: Killing all these people isn't going to bring your family back. We found something. A chance - maybe...
Clint Barton: Don't.
Natasha Romanoff: Don't what?
Clint Barton: Don't give me hope.
Natasha Romanoff: I'm sorry I couldn't give it to you sooner.
Answer: The Loki from the original timeline is dead, but the 2013 Loki that is imprisoned on Asgard is presumably alive and well, and the 2012 Loki that escaped with the Tesseract is alive and supposedly, this version of the character will be the focus of his own upcoming Disney+ series.
Phaneron ★