There's a lot of love in him. If he hadn't figured out somewhere to channel it, he likely would have exploded.

[...blushing, very slightly]

...Mmm. They're... my redemption, in a way. ... Father was the one who fought with me over what I thought I was, over and over and over again, until I was willing to accept that I had been wrong. And Rin... well. It's very difficult to argue with a small, innocent child over why you might not be all that they see in you. It's far easier to just accept it, and change to match.