Bellamy! Bellamy, turn around!

Kane

He reached for me and I didn't help him.

Harper

Clarke: I know that, but you just said it, we have no choice.
Abby: No, we have to make a choice.

Ilian: You want to survive out here alone? Let me help you.
Octavia: You've helped enough.

Bellamy: It's pathetic, right? She hates me, but I keep coming back for more.
Clarke: She's your sister. She's blood. She'll come around and see how special you are.
Bellamy: Clarke... If I don't see you again...
Clarke: No. You will.

And if we do save everyone? Then what? What happens once you've turned us all into nightbloods? Do we just keep on killing each other?

Roan [to Clarke]

If you do this, you're no better than [Pike] was.

Kane [to Octavia]

Luna: For years, I reveled in death and violence. I killed my own brother. So trust me when I tell you – if I found peace, you can.
Murphy: Well, I think peace is overrated. It's the fighters who survive.

Darkness can kiss my worthless ass. Congratulations, you're the new Raven-sitter.

Murphy [to Luna]

Lexa would be proud of you. We're all your people now. She believed that too. She lives on through you.

Niylah

Octavia is dead. She died when you killed Lincoln.

Octavia [to Bellamy]

Monty: I do, however, feel the need to reiterate you’re about to drive the last 10 barrels of hydrazine known to man — cargo which Raven needs every last drop of — through hostile territory, packed with warring clans, over uneven roads where one serious bump could cause an explosion that would not only kill all of you, but would wipe out mankind's only remaining chance for survival.
Roan: What could possibly go wrong?

The 100 Quotes

Lexa: My fight is over.
Clarke: No, I won't accept that.
Lexa: You were right, Clarke. Life is about more than just surviving.
Clarke: In peace may you leave the shore. In love may you find the next. Safe passage on your travels until our final journey on the ground... May we meet again.

Bellamy! Bellamy, turn around!

Kane