Romans 3:21-25

The righteousness of God without from the law is manifested. In Greek, "without law". A righteousness that does not spring from perfect obedience to law ("without law"), is predicted both by the law of Moses and the prophets of Israel. Even the righteousness of God . . . by faith of Jesus Christ. The Gospel, where we are "justified by faith, and have peace with God through Jesus Christ" (Ro 5:1). All were guilty under the law, but the law and prophets pointed to forgiveness in Christ.

Unto all and upon all them that believe. There is justification for every sincere believer, whether Jew or Gentile, for there is no difference between them, but not for the unbelieving impenitent.
For all have sinned. This has been already shown.

And come short of the glory of God. Wycliffe says, "Have need of the glory of God". I believe this suggests the idea. Man was made originally in the image of God. He was then sinless. No sinner is in the Divine image. All have sinned, and to have the divine likeness restored, need to have their sins blotted out. Until this is done they come short of the glory of God.
Being justified freely by his grace. All who believe upon Jesus Christ have their sins thus blotted out, being freely, as a divine gift, justified (that is, counted just, or sinless) by grace, through the redemption that is in Christ Jesus. Christ redeems the sinner who puts his trust in him. His blood pays the debt that the sinner owes to justice. Since Christ, the sinless One, has suffered for sin, God will accept his suffering for the debt of those who love and trust in him. Whom God hath set forth [to be] a propitiation. Christ was publicly shown forth as a MERCY SEAT (a Propitiatory). As God of old met Israel at the mercy seat when the blood of the atonement was offered (Ex 30:6), so Christ on the Cross is our mercy seat. There we meet God who comes to us then in tender mercy, to declare his righteousness, to show it to us, in bestowing righteousness upon us in forgiving out past sins. This system of forgiveness, or righteousness through the cross of Christ, is the righteousness without law predicted by the Law and the Prophets.
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