“Think this is it, kiddo. Promise me one thing, will ya? Not askin' you to never give up. Sometimes you gotta let go... Just don't let anyone change who you are, 'kay? Good night, Valerie. Today was a good day.”
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“Goodbye, V. And never stop fighting.”
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“You’re already becoming someone else. Every second of the day.”

"When I found out I was going to be a father, I was so scared. I had to be there for you and your mother, no matter what. I couldn't just go off and get myself killed anymore. But I had it wrong. Being a father didn't make me scared, it made me brave. Don't make the same mistake. Be yourself. Be free."

"This is real darkness. It's not death, or war, or child molestation. Real darkness has love for a face. The first death is in the heart, Harry."
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“Yes — you’re ready to start building communism again. You’ve built it before, they’ve built it before. Hasn’t really worked out yet, but neither has love — should we just stop building love, too?”

“I wish I could stay in this moment forever. I guess I actually can now. But then it wouldn’t be a moment.”

“Find something to believe in, and find it for yourself. When you do, pass it on to the future.”
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“Building the future and keeping the past alive are one and the same thing.”
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“We can tell other people about - having faith. What we had faith in. What we found important enough to fight for. It's not whether you were right or wrong, but how much faith you were willing to have, that decides the future.”

"Our journey may have been meaningless. Our past may have been a mistake. But we’re not going back. Even if this world comes to an end. Because this. This is the world with the people we cherish."
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“Perhaps now we understand that not everything needs an answer.”

This entire exchange from the finale:
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The Nameless One: Then this is my final question: What can change the nature of a man?
The Transcendent One: The question is meaningless.
The Nameless One: Nonetheless, before there is an ending between us, I will hear your answer.
The Transcendent One: Then this is my answer, and you are the proof: Nothing can change the nature of a man.
The Nameless One: You're wrong. If there is anything I have learned in my travels across the Planes, it is that many things may change the nature of a man. Whether regret, or love, or revenge or fear - whatever you believe can change the nature of a man, can.
The Transcendent One: Then you learned a false lesson, Broken One.
The Nameless One: Have I? I've seen belief move cities, make men stave off death, and turn an evil hag's heart half-circle. This entire Fortress has been constructed from belief. Belief damned a woman, whose heart clung to the hope that another loved her when he did not. Once, it made a man seek immortality and achieve it. And it has made a posturing spirit think it is something more than a part of me.
The Transcendent One: Your defiance will hurt you more than any wound in this place. Belief cannot change the nature of a man.
The Nameless One: I think it can. I think belief could even unmake me, if I believed it enough.

"You have to be strong on your own. You have to live! You have to go home... Tell everyone about what happened here. So that... nothing like this ever happens again."
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“Be brave! Be the bravest ever!”

Geralt: You tell me what it’s like to have a heart of stone.
Olgierd: Ah, it's wonderful at the start. You feel no fear, no angst ... but also no concern, no care for anyone, not even those you loved. And gradually you lose them... Well, you know how it ended.