If you don’t grasp the meaning of Jesus’ opening line from the Sermon on the Mount, you’ll misunderstood the entire sermon.
Blessed are the poor in spirit, for theirs is the kingdom of heaven.— Matthew 5:3
Jesus was a Jew born under the Law. During his earthly ministry, he preached the Law. He wasn’t creating new rules. He was simply teaching the true meaning of the Law. Why? So that all the world, including the self-righteous, self-proclaimed law-keepers, would become guilty before God (Romans 3:19).
The purpose of the Law was never to make anyone righteous but to reveal our unrighteousness. The Law was just a road sign pointing us to Jesus. Only those who realize they are sick will seek a cure from a physician. Likewise, only those that recognize their spiritual poverty will call upon the mercy of a loving and forgiving God.
God opposes the proud but gives grace to the humble.— 1 Peter 5:5