[ “Put on then, as God's chosen ones, holy and beloved, compassionate hearts, kindness, humility, meekness, and patience, bearing with one another,” Castiel could recite. But lauding Dean for his virtues while quoting passages about kindness and forgiveness would only get him berated for hypocrisy again, so Castiel keeps his reasoning less divine. ]

Because you saved me, Dean. You could've left me to die in my car while you escaped, but you helped me instead.

[ Castiel pushes the bucket of water towards Dean for easier access to rinse the quickly darkening cloth he's using to wipe his face. Then he crosses his fingers loosely over his knees again and looks at Dean again with steady appraisal. ]

I'd like to return the favor.