Michael: Think of the million random choices that you make, and yet how each and every one of them brings you closer to your destiny. Do you know why that is? Because it's not random. It's not chance. It's a plan that is playing itself out perfectly. Free will's an illusion, Dean.
Castiel: And you think that hate and anger, 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. That is who you are.