We need to recognize that we don't know what is best. Some people in the Charismatic movement claim that God always wants to heal us. Sometimes we don't believe he wants to heal us. Jesus not only has the ability to save, He has the authority to command. Therefore, we learn about Jesus' power as well as his authority.
Faith needs to be followed by obedience.
It is not enough to be just cured or cleansed. The spiritual parallel is that it is not enough to be saved. Obedience is preferred over impulse. Disobedience hinders God's work. The word for anger is ethraem.