[ Boy, you are gonna have a hard time doing your ninja homework if you can't clear your mind a little bit. ]

It's there, but -- asleep, for most. [ She pauses, before jabbing him lightly in the chest. Now, there's a new, slightly different sensation -- his own energy! ] If you don't start learning while you're small, it's not nearly as natural ... and more often than not, it becomes more and more difficult to "wake up" as time goes on without using it. In the case of shinobi, it's important that we're able to use it just as easily as we breathe, so we can react instinctively in a fight.