How does good and bad differ from each other?

They are different because bad is like not good. And not means the opposite. So good and bad is different because these Words are the opposite of other. Well, there are many different things different about good and bad. It is like evil and angel. They are bad and good. So, if I wanted to use good in an sentence I would write, "The angel is good." And for bad I would write "The evil is the bad."