It is the Chinese belief that, if you burn something, it will reach the departed person you intended it for.
Kakashi, it's me. Obito. Not that you can see me or hear me, even though I'm standing right here...but it would feel weird to not say got your letter. Minato-sensei can't come find you himself - I was there, watching, and I have no idea what he did to get himself into that situation - so I'm here to pass on the message, because it would be wrong not to.
He says he's sorry. But he doesn't think he could have done it any differently. Watch over Naruto for him, please, watch over Konoha; he's sorry he can't do it himself anymore, he's sorry he broke his promise to you, to us, but he had more important promises to keep, however poor an excuse it is.
I haven't found Rin yet; it's such a mess on this side, there's so many... But I know what she'd say, and it's what I'd say to you too, Kakashi.
The team's not all dead yet. There's still you. What are you doing, standing here talking to us? We can wait, and we'll always be with you anyway. Get out there and live! Do something!
Ugh, this is so frustrating. No matter how loudly I shout, you'll never hear me...and I don't want you to be able to, either.