This sermon compares ceremonial purity, moral purity and purity of the heart. We are blessed when our our hearts are purified, and this enables us to see God right now but one day we will see Him face to face. The important thing is that God is looking at our hearts.
Jesus points to a different way of life – a life where godly characteristics develop in our lives from the inside out. This beatitude focuses on showing loving kindness to those around us. One block to reaching out in mercy to others is unforgiveness.