"People live their lives bound by what they accept as correct and true. That's how they define "reality". But what does it mean to be "correct" or "true"? Merely vague concepts... Their "reality" may all be a mirage. Can we consider them to simply be living in their own world, shaped by their beliefs?"
-Itachi Uchiha, Naruto Shippuuden (sry für englisch aber es klingt viel besser)