Abe: This time travel crap, just fries your brain like a egg.
Joe: This is my life now. I earned it. You had yours already. So why don't you do what old men do, and die?
Older Joe: I don't want to talk about time travel because if we start talking about it then we're going to be here all day talking about it, making diagrams with straws.
Joe: Time travel has not yet been invented. But thirty years from now, it will have been.
Seth: Ask yourself: who would I sacrifice for what's MINE?
Joe: I'm gonna fix this! I'm gonna find him, and I'm gonna kill him!
Chosen answer: Writer/director Rian Johnson has stated that he didn't write the script with the intention of having Abe and Kid Blue be the older and younger versions of the same character, but that he likes the widespread fan theory that they are, acknowledging that the dynamic he wrote for the two characters very much lends itself to that interpretation. So that's an official "No, but it's a cool idea".
Tailkinker ★