 When citizens occupy public roles, political morality requires them to think and act differently than they would if they were acting as private individuals. If you are a judge in a criminal trial, you might stand to benefit personally if the defendant were found guilty. But political morality does not allow you to decide cases as if you were a private individual, looking to advance your own private objectives. As a judge, you are required to make decisions based on the evidence presented at trial and the standards set out in the law. These legal standards themselves are supposed to answer to common interests. So, in effect, political morality directs you to think and act from the standpoint of a shared concern for common interests.