Mill begins by trying to pin down the meaning of justice, by coming up with a list of those things that are commonly classified as just or unjust. First, it is considered unjust to deprive someone of his legal rights. However, this concept has exceptions. For example, a person may have legal rights he should not have--his rights may be the provision of a bad law. While people vary on whether bad laws can be justly disobeyed, all people agree that laws can be unjust. Therefore, law cannot be the ultimate standard of justice. A second form of injustice comes from depriving someone of something he has a moral right to possess. Third, it is considered just that a person receive what he "deserves," and unjust that he obtain something he doesn't deserve; people are thought to deserve good things if they have done right, and evil things if they have done wrong. A fourth form of injustice is to violate an agreement with someone or disappoint expectations that one knowingly nurtured. Fifth, it is considered unjust to show favoritism and preference in inappropriate circumstances. However, it is not generally necessary to be impartial; for example, one doesn't have to be impartial in the selection of friends. The claim is rather that a person should only be influenced by those considerations that should apply in a given circumstance. Finally, the idea of equality is seen by many to be a component of justice; some people may make an exception for the sake of expediency, however.