Complex sentence: The third sword means priests and monks and nuns who commit the treason of Judas: while giving up their vocation, they often lose also their faith, their eternal beatitude, and become enemies of the Church.
Split into simpler sentences: The third sword means priests and monks who commit the treason of Judas. While giving up their vocation, they often lose also their faith, their eternal beatitude, and become enemies of the Church.