The Franciscan rule of 1221:
The brothers who go thus [among the Muslims] can envisage their spiritual role … by not making accusations or disputes, but being subject to every human creature for the sake of God and simply confessing they are Christians.
Unlike Mother Church, who viewed Islam as its greatest enemy, Brother Francis approached the other faith in the love of God. But the prescription of respect proved too innovative for the Church and disappeared only two years later in the rule of 1223.