Blessed are they which are persecuted for righteousness' sake: for theirs is the kingdom of heaven. God knows that being who He wants is not the way the world acts. By doing the opposite of the world we will be made fun of or worse because people don't understand why we don't do things only for ourselves. By living a life doing things for others confuses the way the world thinks. A lot of people in the world want beauty, money, and don't care about others as long as they get what they want. This is opposite to the life God wants us to lead. Doing the right thing isn't easy but God wants us to know that the kingdom of heaven is waiting for us if we can get through the tough times in this life.