Amplified Bible, Classic Edition Romans 3:30 Since it is one and the same God Who will justify the circumcised by faith [which germinated from Abraham] and the uncircumcised through their [newly acquired] faith. [For it is the same trusting faith in both cases, a firmly relying faith in Jesus Christ].
The entire book of Romans is an exposition on justification by faith. We have been justified, “just as if we haven’t sinned”. That’s the beauty of this theology. God cannot see our sins anymore as they have been covered by Jesus’ blood. Not only are we forgiven, and not only has God forgotten our sins, they are also not in any record in of God’s books anymore. To Him, we have not sinned at all. Amazing!
To better appreciate justification. We have to understand the concept of justice first.
This idea of justice is universal, all human civilization no matter how primitive it is has an idea of justice which is not surprising.
Rom 2:14 For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:
Rom 2:15 Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;)
Another element of justice is the wrath to all ungodliness.
Rom 1:18 For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness;
And justice comes with judgement to anything that is wrong.
In order for justification to be possible, someone took the judgement the punishment for others.
Rom 5:16 And not as it was by one that sinned, so is the gift: for the judgment was by one to condemnation, but the free gift is of many offences unto justification.
Rom 5:17 For if by one man’s offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.)
Rom 5:18 Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life.
Rom 5:19 For as by one man’s disobedience many were made sinners, so by the obedience of one shall many be made righteous.