How do you know why something that is bad, is bad?

Question

I mean how do you differentiate between good and bad ? since something which is good to me may be equally bad for someone else and something that I think is bad might be good to others ..on what basis something is labelled as 'good' or 'bad' ? is there a standard or something?

Answer 1

its your personal opinion, I know what you mean though. like what Voldermort was doing to the wizarding world was bad from Harry's point of view, but not from his.

Answer 2

Good and bad or right or wrong, in a court of law is usually determined by asking yourself, would a normal, sane person act in that manner.?