...Every single one of us goes through life depending on and bound by our individual knowledge and awareness. And we call it reality. However, both knowledge and awareness are equivocal. One's reality might be another's illusion. We all live inside our own fantasies, don't you think?
Masashi KishimotoKabuto: It's always easier said than done. I just said that this jutsu had no weaknesses or risk... Itachi: Every jutsu has its weakness. This jutsu's weakness and risk is...the existence of me!
Masashi Kishimoto