Those who have believing masters, let them not despise them, because they are brothers, but rather let them serve them, because those who partake of the benefit are believing and beloved. Teach and exhort these things.

 The word here used for contentment is autarkeia (0841). This was one of the great watchwords of the Stoic philosophers. By it they meant a complete self-sufficiency. They meant a frame of mind which was completely independent of all outward things, and which carried the secret of happiness within itself. 