Board Thread:Theories and Speculation/@comment-32742265-20180119154238/@comment-734582-20180126173722

LegionZero wrote: but he learned the fireball jutsu at a very young age. He didnt "just know the seals" I know. I meant that Sasuke wasn't shown or implied to have been taught Fire Release specifically. Rather, it seems to me that the seals in part ensure the nature transform. Similar to how the Alliance could use Earth Release through a low-level jutsu by knowing the hand seals. Ergo, learning releases isn't necessarily that hard. But as shown with Naruto, using them on a large scale is hard.