Become Exalted In Virtue

The brothers shall acquire nothing as their own, neither house, nor place, nor anything at all. Instead, with all trust, let them go begging alms as pilgrims and strangers in this world, serving the Lord in poverty and humility, and without shame, since the Lord made himself poor for us in this world. This is the highest summit of poverty, which has made you, my most beloved brothers, heirs and kings in the kingdom of heaven; it has made you poor in material things but exalted in virtue.

St. Francis
Rule of 1223
Chapter VI