These two things are very often confused. An everyday example is the common cold. We treat the runny nose, the cough, and the fever. These are symptoms of a cause that remains untreatable. We can take the medicine and get better in two weeks or can refuse the medicine and get better in about 14 days! Why bring this up?
In a very real way, we have the same problem with sinful actions and attitudes. We try to teach and/or enforce outward behavior (just the like the Pharisees), but those actions are the symptoms, not the cause. Jesus said, A new commandment I give to you, that you love one another; as I have love you, that you also love one another. By this all will know that you are My disciples, if you have love for one another (John 13:34-35). This so impacted the Apostle John that he spent his life’s ministry admonishing Christians to love one another. Near his death, his explanation for his constant reminder was the Lord had commanded love, and if it alone was done faithfully and well, it would be enough. You see, sin is a symptom of an underlying cause. We sin against God because our love for Him is not sufficient. We sin against our fellow-man because our love is not what it needs to be. Self-love is usually far too prominent while love for God and others lags far behind. If love be done well toward God and others, we wouldn’t have to spend too much time correcting outward actions. Think about it!
Soli Deo Gloria!