Most of the book was data: mission logs, jutsu classifications, clan bloodlines. But it was the final section, written in a cramped, clinical hand, that Sai had been ordered to destroy. And yet, he could not.
The pattern was there, in every entry. The cold, objective truth of a man who had tried to erase his heart... and then, in the margins, the quiet, desperate corrections of a man who had found it again. naruto databook 4
"I have spent my life recording the weapons a shinobi can become. But I never recorded the one thing that saved me. The thing Naruto never lost. It is not a jutsu. It is not a bloodline. It is not even a strategy. Most of the book was data: mission logs,