This section discusses the importance of enjoining good and forbidding evil in Islam. It is one of the most important principles in the religion and the main reason why prophets were sent. Whenever this principle is not implemented, misguidance and corruption prevail. Allah obligates Muslims to call others to good, enforce what is right, and prohibit what is wrong. Righteousness is not complete without practicing this principle. When Muslims command virtue and forbid vice, they become friends to one another.