You know guys...
When this kinda dialogue come up, i always ended up thinking that it's all about naruto again..
You all must've remembered that every time naruto starts talking like this, it means naruto will play a big part to change people...
Once again, naruto will start talking that he knows how's pein's really pain...and he understands nagato so badly...
I think that will come to the future is...through the fight and lot of dialogues, naruto will finally beat pein a.k.a nagato...
And as usual, the final words, like the regretness, or the enlightment will come in the end...maybe in the last breath of nagato...
I mean seriously...this fight will lead to the talking about friendship, family, relationship, and something like that... That's what really naruto really good at...make people understand more about life..right?
But i hope kishi didn't bring that typical kinda plot to this one...since nagato is quite a big enemy for naruto and konoha, and to all shinobi...
Then again, i think the typical plot will finally showed up in the end...it's the nature of naruto..