Think of the men serving under our military commanders. How well disciplined they are! How readily and submissively they carry out orders! Not everyone can be a prefect, a tribune, a centurion, or a captain of fifty, but each man in his own rank executes the orders of the emperor and the officers in command. The great cannot exist without those of humble condition, nor can those of humble condition exist without the great. Always it is the harmonious working together of its various parts that insures the well-being of the whole. Take our own body as an example: The head is helpless without the feet; and the feet can do nothing without the heart. Even our least important members are useful and necessary to the whole body, and all work together for its well-being in harmonious subordination.