Titus 2:9

9.Servants, that they be subject to their masters It has been already said that Paul merely glances at some things by way of example, and does not explain the whole of these subjects, as if he undertook, expressly, to handle them. Accordingly, when he enjoins servants to please their masters in all things, this desire of pleasing must be limited to those things which are proper; as is evident from other passages of a similar nature, in which an exception is expressly added, to the effect that nothing should be done but according to the will of God.

It may be observed that the Apostle dwells chiefly on this point, that they who are under the authority of others shall be obedient and submissive. With good reason he does this, for nothing is more contrary to the natural disposition of man than subjection, and there was danger lest they should take the gospel as a pretext for becoming more refractory, as reckoning it unreasonable that they should be subject to the authority of unbelievers. So much the greater care and diligence ought pastors to use for either subduing or checking this rebellious spirit.