|“||Psychopaths are not crazy. They're fully aware of what they do and of the consequences of their actions.||„|
|~ Hannibal Lecter to Will Graham|
Psychopaths, as stated by Lecter's quote above, are NOT crazy or psychotic, and are often mistaken for being so. Psychopaths are completely aware of reality while psychotic people are polar opposites; they hear voices, hallucinate, and often do not fully understand what they are doing.
Sociopathy is a version of psychopathy. Psychopaths however are often more intelligent, while sociopaths are good liars who don't have many feelings, but understand others' feelings way too much. A lot of sociopaths have a facade they use in order to blend into society. However, this does not mean that every sociopath is villainous; in fact, most sociopaths in real-life are people living a completely normal life, and in fiction, some may even be heroic (though they are antiheroes).
Psychopathy is usually a persistent condition from birth, but it can be induced by a succession of horrific events that twisted the sanity of said characters.