God’s justice demands that human nature, which has sinned, must pay for its sin; but a sinner could never stands at odds with God because of our sin, so that means that the one to be the recipient of God’s justice So thank God for the grace given through Jesus: that although God would have been perfectly justified

God requires that his justice be satisfied. Therefore the claims of his justice must be paid in full, either by ourselves or another. This is the message of the Bible: we sinned but Christ fully paid the claims of God's justice. He will justify many. He will bear their iniquities. Isaiah is talking about Jesus. To satisfy God’s justice, Jesus pays for our sins in full.

It is God who justifies. 34  Who then is the one who condemns? No one.

Because your sin has been fully atoned (paid) for, you are now completely justified before God. continue, and you do need to continue to confess and repent from your ongoing sin, be assured that your justification

Yet they do not count toward our justification— for by faith in Christ we are justified, even before

Yet they do not count toward our justification— for by faith in Christ we are justified, even before

In v20, Paul gives the clarification the Jewish people needed to hear: no one can be justified by upkeeping

In other words, God decreed  to grant them true faith in Christ, to justify them,  to sanctify them, 

Therefore, far from making people cold toward living in a pious and holy way, this justifying faith,

Therefore, far from making people cold toward living in a pious and holy way, this justifying faith,