The Westminster Shorter Catechism answers the fourteenth question, “What is sin?” by the response, “Sin is any want of conformity to, or transgression of, the law of God.” Here we see sin described both in terms of passive and active disobedience. We speak of sins of commission and sins of omission. When we fail to do what God requires, we see this lack of conformity to His will. But not only are we guilty of failing to do what God requires, we also actively do what God prohibits. Thus, sin is a transgression against the law of God.