"there is no essence, but a set of appearances", as Sartre would say. or as Hobbes would say, complementing it: "homo homini lupus".
I have a great evil inside me, yeah. the conciouness of it makes me wanna balance it and prevents me from doing evil. the moment I say " I'm a good person", tho, is the moment I betray myself and start tending to the dark force. good needs no words. you're only as good as your actions prove you good.