In the Sermon on the Mount, Jesus teaches what it looks like to live FROM the heart and INTO a very real, present, and available Kingdom that He came to show His followers.

The life of the kingdom is principally (but not exclusively) spiritual - therefore, it has to be a matter of the heart before it can expand into a manifest reality through our day-to-day lives. Jesus is teaching us that we must live from the inside out to be people who see His will done and His Kingdom come.