"If we're gonna "understand" each other, first we gotta make 'em suffer like we're sufferin'! Like when they stop a fight because someone got injured! But I know that'll never happen… that's why there'll always be war. It always rains here and I hate it. It's like this whole country is a big crybaby. I'm going to change it… and protect everyone!"

http://naruto.wikia.com/wiki/Yahiko