The pleasure of those who injure you lies in your pain. Therefore they will suffer if you take away their pleasure by not feeling pain
TertullianThe angels as the guardians of men are set over men as instructors and monitors. This shows the relationship that is to exist between them. Man's attitude is to be one of obedience and subjection. He is to follow the lead of the angels, and consequently some reverence is already implied in the very relationship that exists between man and angel.
TertullianYou can judge the quality of their faith from the way they behave. Discipline is an index to doctrine.
Tertullian