[ As if he's a proud older brother - having only just met his newfound friend - the Doctor smiles a little. ]

You sound very wise and very grown. Certainly, all of your 800 years. You know, I've met people older than you who didn't sound nearly so wise. You could have gone down a different path with all that power, but you recognized your need to change. We should all be more like that. Like you.

[ He includes himself in that, in a roundabout way. ]

No sorries allowed, not when you've been kind. Tea will suit me, promise.