"For The Love Of God."

One of the expressions we use in ordinary speech always moved Francis profoundly whenever he hears it, and it was, "For the love of God." As soon as he would hear these words, they would excite him, work upon him, and enkindle him, as if an inner chord had been plucked by them. And he kept faithfully till his death the promose he made to himself when he was still living a worldly life, that he would never refuse a poor person who begged anything "for the love of God." He used to say, "How greatly we should love the very love with which God has loved us so much."

Celano
Second Life - 196