Did I ever tell you what the definition of insanity is? Insanity is doing the exact... same fucking thing... over and over again expecting... shit to change... That. Is. Crazy.

I used to be an adventurer like you … then I took an arrow in the knee.

War.. war never changes.

Do you like hurting people?

Niko, let's go bowling.

But as long as there are people, there will always be war.

Tom: "Turing tests are tests designed to tell humans and machines apart. Typical problems only solvable by a human. A combination of logical and lateral thinking."
Ava: "So you can't complete these tests Tom?"
Tom: "No. That is why I am glad you are here to help."

Ah shit, here we go again.

I survived because the fire inside me burned brighter than the fire around me.

There are two kinds of people: ones that are trying to build their future and ones that are trying to rebuild their past.

You are approached by a frenzied Vault scientist, who yells, "I'm going to put my quantum harmonizer in your photonic resonation chamber!"

I am diversification personified... or personification diversified.

The last time a big naked dude said he could help me, it did not end well.

Cortana: "What if you miss?"
Master Chief: "I won't."

Death is a preferable alternative to communism.