Ambrose of Milan — as excerpted in the Catena Aurea on Luke 7:24-28

“Not unmeaningly then is the character of John praised there, who preferred the way of righteousness to the love of life, and swerved not through fear of death. For this world seems to be compared to a desert, into which, as yet barren and uncultivated, the Lord says we must not so enter as to regard men puffed up with a fleshly mind, and devoid of inward virtue, and vaunting themselves in the heights of frail worldly glory, as a kind of example and model for our imitation. And such being exposed to the storms of this world, and tossed to and fro by a restless life, are rightly compared to a reed.”