Basically, I think this song is about just not giving a fuck what anyone tells you to think or believe because you have to figure it out for yourself. There's also a very strong feeling of resentment here, perhaps related to a relationship, a friend, or an employer who fucked you over. The overall message is that no matter what anyone says it doesn't matter because it's up to you as an individual as to what to think, even if what you think may be considered incorrect or improper.
Basically, I think this song is about just not giving a fuck what anyone tells you to think or believe because you have to figure it out for yourself. There's also a very strong feeling of resentment here, perhaps related to a relationship, a friend, or an employer who fucked you over. The overall message is that no matter what anyone says it doesn't matter because it's up to you as an individual as to what to think, even if what you think may be considered incorrect or improper.