The world around him was, as has been noted, a network of feudal and family and other forms of dependence. The whole idea of St. Francis was that the Little Brothers should be like little fishes who could go freely in and out of that net. They could do so precisely because they were small fishes and in that sense even slippery fishes. There was nothing that the world could hold them by; for the world catches us mostly by the fringes of our garments, the futile externals of our lives.
