(16) Know ye not.--An apparent tautology, but one which really teaches a deep ethical truth. Don't you know that what you make yourselves that you become? The habit which you form ends by becoming your "second nature."

6:16-20 Every man is the servant of the master to whose commands he yields himself; whether it be the sinful dispositions of his heart, in actions which lead to death, or the new and spiritual obedience implanted by regeneration. The apostle rejoiced now they obeyed from the heart the gospel, into which they were delivered as into a mould. As the same metal becomes a new vessel, when melted and recast in another mould, so the believer has become a new creature. And there is great difference in the liberty of mind and spirit, so opposite to the state of slavery, which the true Christian has in the service of his rightful Lord, whom he is enabled to consider as his Father, and himself as his son and heir, by the adoption of grace. The dominion of sin consists in being willingly slaves thereto, not in being harassed by it as a hated power, struggling for victory. Those who now are the servants of God, once were the slaves of sin.Know ye not, that to whom ye yield yourselves,.... The apostle goes on with his answer to the above objection, by making use of an argument from the nature of servants and their obedience, a thing well known to everyone, and which none could be ignorant of; which he delivers by way of distribution, that such who yield themselves

servants to obey, his servants ye are to whom ye obey, whether of sin unto death, or obedience unto righteousness: such who obey sin, are the servants of sin; they are at the beck and command of sin; they give up themselves to the service of it with delight and diligence, and are perfect drudges to it: this is a very unhappy situation; their service is very unreasonable; and they are rendered incapable of serving God, for no man can serve two masters; they are hereby brought into the drudgery of the devil; into a state of bondage, out of which nothing but grace can extricate them; into a very mean and contemptible condition, and even a deplorable one; for if grace prevent not, they will have the wages of sin paid them, which is death, for their obedience is "of sin unto death"; which will lie in an eternal separation from Father, Son, and Spirit, in a sense of divine wrath, and in the company of devils and damned spirits: now this is added, to show the malignant nature and just demerit of sin, and to deter and dissuade persons from the service of it: on the other hand, such as obey the Lord, are the servants "of obedience unto righteousness": but why is not this obedience, which is the obedience of faith to the Gospel, of Christ, and of the new man to God or Christ, said to be "unto life", as the antithesis seems to require? because though death is the fruit of sin, yet life is not the fruit of obedience, but the fruit of obedience is righteousness; by which is meant, nor a justifying one before God, but righteousness before men; or a course of living soberly and righteously, which is the effect of being under grace; and hence it appears, that true believers can make no such ill use of their privilege, as is suggested in the objection.