"...I wondered what it could be, what... what my true happiness could even look like. I never found an answer. Because the one thing I want... it's something I know I can't have. But I think I know... I think I know now. Happiness isn't in the having. It's in just being. It's in just saying it.
"I know. I know how you see yourself, Dean. You see yourself the same way our enemies see you. You're destructive and you're angry and you're broken. You're... you're 'Daddy's Blunt Instrument.' And you think hate and anger, that's... that's what drives you. That's who you are. It's not. And everyone who knows you sees it. Everything you have ever done, the good and the bad, you have done for love. You raised your little brother for love. You fought for this whole world for love. That is who you are. You're the most caring man on Earth. You are the most selfless, loving human being I will ever know. You know, ever since we met and ever since I pulled you out of Hell, knowing you has changed me. Because you cared, I cared. I cared about you. I cared about Sam. I cared about Jack. I cared about the whole world because of you. You changed me, Dean."
"Why does this sound like a goodbye?"
"Because it is. I love you."
"I love you too, Cas."
"Goodbye, Dean."

"All right, I've been thinking. When life gives you lemons? Don't make lemonade. Make life take the lemons back! Get mad! 'I don't want your damn lemons! What am I supposed to do with these?' Demand to see life's manager! Make life rue the day it thought it could give Cave Johnson lemons! Do you know who I am? I'm the man who's going to burn your house down! With the lemons! I'm going to get my engineers to invent a combustible lemon that burns your house down!"