Romans 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 Romans 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.