Agents of S.H.I.E.L.D., Season 3

Ward:
Saw something terrible today. When I say "terrible," I mean ancient and powerful. It's changed how I see things. I've never believed I was worth anything... that what I said or did had any meaning. Maybe that's why I'm a spy. Or why I agreed to come here.

Coulson:
If you're trying to talk me out of this, you can save your breath.

Ward:
I'm not looking for mercy or absolution. I just want you to know, I've been where you are right now. Filled with rage, wanting revenge... I chose Hydra for petty, personal, selfish reasons... for a father figure, for vengeance... for closure. But what I saw today gave my life meaning. For the first time ever, I have a sense of satisfaction that I never experienced when I was seeking revenge.

Coulson:
[shoots Ward in the arm] Gotta say, feels pretty satisfying to me.