Hidan and Pain in “Unfinished Business”

Hidan

I was just about to prove to those heathens the might of the way of Jashin!

Pain

The Leaf aren't heathens. They venerate their ancestors and follow the Will of Fire. In fact, one could say their motives for fighting are just as justified as yours.

Hidan

How dare you! Are you trying to insult me?

Pain

No. I do not intend to ridicule the reasons why you do battle. After all you and I are birds of a feather. It doesn't matter what you do to justify war. Religion, philosophy, resources, land, revenge, love, even on a whim. No matter how trivial the motive, they're all worthy causes for war. There will always be war. The reason can be found later. Human instinct seeks conflict.