Römer 6:14

For Sin shall not have dominion over you--as the slaves of a tyrant lord. for ye are not under the law, but under grace--The force of this glorious assurance can only be felt by observing the grounds on which it rests. To be "under the law" is, first, to be under its claim to entire obedience; and so, next under its curse for the breach of these. And as all power to obey can reach the sinner only through Grace, of which the law knows nothing, it follows that to be "under the law" is, finally, to be shut up under an inability to keep it, and consequently to be the helpless slave of sin. On the other hand, to be "under grace," is to be under the glorious canopy and saving effects of that "grace which reigns through righteousness unto eternal life through Jesus Christ our Lord" (see on Rom 5:20-21). The curse of the law has been completely lifted from off them; they are made "the righteousness of God in Him"; and they are "alive unto God through Jesus Christ." So that, as when they were "under the law," Sin could not but have dominion over them, so now that they are "under grace," Sin cannot but be subdued under them. If before, Sin resistlessly triumphed, Grace will now be more than conqueror.

The apostle having at large asserted, opened, and proved, the great doctrine of justification by faith, for fear lest any should suck poison out of that sweet flower, and turn that grace of God into wantonness and licentiousness, he, with a like zeal, copiousness of expression, and cogency of argument, presses the absolute necessity of sanctification and a holy life, as the inseparable fruit and companion of justification; for, wherever Jesus Christ is made of God unto any soul righteousness, he is made of God unto that soul sanctification, Co1 1:30. The water and the blood came streaming together out of the pierced side of the dying Jesus. And what God hath thus joined together let not us dare to put asunder.

6:14 you no longer live under the requirements of the law: With the Messiah’s coming, the era governed by the law of Moses came to an end (see Gal 3:19-25). • you live under the freedom of God’s grace: God’s dealings with his people have always been characterized by grace, but grace dominates the new era in which Christians live in Christ. Cp. John 1:17.