He nodded. Likely, Gai would never know what was said that had effectively changed Kakashi so deeply. If Obito wouldn't say, Kakashi certainly wouldn't.

What Gai had said earlier, that Obito was far wiser than Kakashi gave him credit for, was a terrible understatement. Obito was strangely insightful. Perhaps that was what happens when one nearly dies. "Whatever you said to him worked. I suppose, however hurtful, out of pain comes growth!"