Talk:Firebending/@comment-24.59.22.94-20100903174549/@comment-65.48.239.242-20100906225330

His drive was trying to capture the Avatar. That was his goal, the one reason that fueled his existence. It was the very thing that made his life worth living during his time exiled from the fire nation, and he thought it was the only way he could be acknowledged by his father again.

But all of that became pointless when he no longer viewed the Avatar as an enemy, when he no longer needed acceptance from his dad. Hence the main thing driving him for 2 and a half seasons was gone, and he couldn't firebend anymore.