Naruto Shippûden2007

Jiraiya:
What happened to you?

Pain:
Nothing happened. Nothing except for the war. Too many people died in this land. All the pain forced me to grow up.

Jiraiya:
What does that mean?

Pain:
That even innocent, foolish children will grow up in the face of pain. Until their thoughts and beliefs are the same as their doubts.

Jiraiya:
But abandoning one's love for his friends and fellowmen. Is that what it means to become an adult?

Pain:
Sensei... You are still merely a man. However I, my endless pain had matured and I became much more that a man.

Jiraiya:
What are you saying?

Pain:
Yes... I've grown from a man... To a God. Since I'm a God, all my words and thoughts became absolute. Poor sensei, you're still only human. It's not your fault if you don't understand what I'm saying.

Jiraiya:
Have you really become that twisted?

Pain:
Things that I couldn't see when I was human are clear to me now that I'm a God. And being a God I realise that there are things I can do which mortal men cannot even dream of. Or to put it simply: I have evolved beyond that. Pain will make the world grow up. Just like it forced us to grow up.