Poverty of spirit is not about lack of material things but of complete trust on the will of God. And yet there's no other life circumstance where you have the chance to find it than in poverty of the materials. A rich man will never have an inkling on how it feels to be desperate with no food to feed the long-hungry stomach, with no future seems in store, and only the Lord on his side. I read an account of the life of Saint Francis of Assissi wherein he faced the pressure from outside to control the Franciscan movement when they have grown to 5000 after ten years. People said that his dream of radical poverty was too harsh. During his time of prayer, he told Jesus about this, "Lord, didn't I tell you they wouldn't trust you?"