"My galaxy is dead. I am machine. I am Chakas. I am human. I am 343 Guilty Spark. I have never understood Forerunners. And they will never understand me."
— 343 Guilty Spark, Halo: Silentium
"Know that all that lingered in me, the memories and emotions of old humanity, when I was still flesh, is also hidden deep within you. It slumbers, but it shapes, and it haunts your dreams and your hopes."
— 343 Guilty Spark, Halo: Primordium
"I can give you over forty thousand reasons why that sun isn't real. I know it because the emitter's Rayleigh effect is disproportionate to its suggested size. I know it because its stellar cycle is more symmetrical than that of an actual star. But for all that, I'll never actually know if it looks real... if it feels real."
— Cortana, Halo 4