Blessed are the merciful, for they will be shown mercy. Blessed are the pure in heart, for they will see God. Blessed are the peacemakers, for they will be called sons of God. Blessed are those who are persecuted because of righteousness, for theirs is the kingdom of heaven. It is only when we know that we need the Savior that we will be willing disciples.
Lack of humility leads inevitably to disobedience.
Jesus then focuses on the nature of discipleship, that it is like salt and light, things that make a difference. But now that He has their attention, He begins speaking of the importance of the heart in true righteousness. Jesus draws attention to the way the outwardly righteous may behave, but adds the necessary attitude of the heart that makes for real righteousness. He points to all nature and demonstrates how well God takes care of His creation which is less important than man. He finishes His sermon on the mountain on a theme of obedience.