1 Timothy 6:2

2Who have believing masters The name of brother may be thought to constitute equality, and consequently to take away dominion. Paul argues, on the contrary, that slaves ought the more willingly to subject themselves to believing masters, because they acknowledge them to be children of God, and are bound to them by brotherly love, and are partakers of the same grace. (116) It is no small honor, that God has made them equal to earthly lords, in that which is of the highest importance; for they have the same adoption in common with them; and therefore this ought to be no slight inducement to bear slavery with patience.

They are believers and beloved It is an additional argument, that slavery is much more easily endured under mild lords, who love us, and whom we love in return. There is also the bond of faith which binds very closely together those who are of different conditions.

These things teach and exhort. He means that these are matters on the teaching of which he ought to dwell largely, and wishes that doctrine should be accompanied by exhortations. It is as if he had said, that this kind of instruction ought to be daily repeated, and that men need not only to be taught, but likewise to be roused and urged by frequent exhortations.