1 Timothy 6:1-2

Lest the name and doctrine of the Lord be blasphemed, or ill spoken of by infidels, when such as were converted refused to be servants. --- Let them not despise them, &c. That is, they who were servants under Christian masters, ought to think themselves more happy on that account, being brethren, and partakers of the same benefit of faith and grace. (Witham) --- If servants be insolent and disobedient, their infidel masters will blaspheme the Christian religion, as if that were the cause of their disrespectful behaviour. And let them not be arrogant, or aspire to an equality with their Christian masters, under pretence that the profession of the same religion makes them brothers; but rather serve them with greater submission and affection, as partakers of the benefit of the same faith, the same baptism, the same hope, &c. (Calmet)