If you’re really rich, you might think you don’t need anyone. If you’re hungry, buy food. Go to a restaurant. Buy the restaurant!
If you’re poor, you don’t have power. You need help. You depend on others for what you need. Do you depend on yourself? That is a ‘spirit rich’ person. Do you know you have to depend on God? That is a ‘spirit poor’ person. Most of us don’t like to think of ourselves as ‘spirit poor’.
But Jesus says His Kingdom belongs to people who know they are ‘spirit poor’. God gives hope and peace now to humble people. God gives grace now to people who know they need Him.