He that has no rule over his own spirit is like a city that is broken down, and without walls.
All Commentaries on Proverbs 25:28 Go To Proverbs 25
John Cassian
AD 435
The example and image used in this text, which compares a person with a city that is broken down and without walls, demonstrates how dangerous it is for a monk to be deprived of [selfcontrol]. Herein is wisdom; herein is knowledge and understanding. Without them can neither our interior dwelling be built nor spiritual riches be gathered, as it is written: “With wisdom a dwelling is built, and with knowledge it is set up again; with understanding its cellars are filled with all precious riches and good things.” .