Catholic Catechism, Thou Shalt Not Covet thy Neighbors Possessions, CCC 2541-2557
In the Beatitude, Blessed are the poor in spirit, for they shall see God, St Gregory of Nyssa teaches us, “He who is given the riches of the soul in exchange for material wealth, who is poor for the sake of the spirit.” This commentary is referenced by the Catechism in Section 2546, which teaches us that “voluntary humility is poverty in spirit,” which guards us from soul-destroying envy. Section 2547 of the Catechism quotes St Augustine: Let the “proud seek after and love the kingdoms of the earth” while the poor in spirit possess the kingdom of heaven. Those who are poor in spirit guard their heart from the sin of envy and covetousness, and those who are poor live a life like that of Christ, the Christ whom St Paul reminds us became poor for our sakes. […]