"I've seen Steelheart bleed."
"I watched Calamity rise."
"I've witnessed the fearsome depths."

I feel so bad for David, but Prof is still really awesome.

(If you're looking for something to hit your feels, then the Reckoner trilogy will hit you hard. I just finished the second book, and DANG. The books in order are Steelheart, Firefight, and Calamity, by Brandon Sanderson.)