That is a great question. Please allow me to answer it in some detail. I'll try and keep the post as short as I can.
Rom. 4:
5 But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.
In Romans 3 and 4, Paul is speaking about the Jews and their religion regarding how a man is Justified (forgiven). He concludes "
Therefore we conclude that a man is justified by faith without the deeds of the law.
In the Law and Prophets, God had Laws, Statutes, Judgments and Commandments. He gave these to Abraham, who is said to have obeyed them.
Gen. 26:
4 And I will make thy seed to multiply as the stars of heaven, and will give unto thy seed all these countries; and in thy seed shall all the nations of the earth be blessed;
5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
God also gave these to Israel, and even had them written down for the first time. But Israel "Transgressed". Something Abraham did not do in God's Eyes.
Ex. 32:
30 And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the LORD; peradventure I shall make an atonement for your sin.
Remember, the Passover Lamb had already been slain. But There was no "LAW" of justification/Forgiveness of Sin given yet.
God ADDED Sacrificial Deeds/Works to provide for forgiveness "Till the Seed should come", through a Priesthood Covenant HE made with Levi. (Mal. 2:4-9)
Abraham had God's Laws, but he didn't have these "works of the Law" for Justification, as Levi was not even born yet. Abraham was justified "apart" from the Added "works of the Law" of forgiveness.
Jer. 7:
22 For I spake not unto your fathers, nor commanded them in the day that I brought them out of the land of Egypt, concerning burnt offerings or sacrifices:
23 But this thing commanded I them, saying, Obey my voice, and I will be your God, and ye shall be my people: and walk ye in all the ways that I have commanded you, (Like Abraham) that it may be well unto you.
The Jews didn't believe Jesus was the Prophesied High Priest "After the order of Melchizedek", and were still promoting the Levitical Priesthood "works of the Law" for forgiveness/justification, not knowing they all pointed to Jesus in the first place.
Paul is explaining that Abraham was Justified apart from this Law. That this Law was "ADDED" because of Transgressions, and was to be in effect until the Promised "SEED" should come.
So he is saying basically;
"For if Abraham were justified by bringing a goat to a Levite Priest, he hath whereof to glory; but not before God.
For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness. (And his belief was confirmed by his works "
So Abram departed, as the LORD had spoken unto him")
4 Now to him that worketh (purchases forgiveness by offering the blood of a goat) is the reward not reckoned of grace, but of debt.
5 But to him that worketh not, (Does not purchase his forgiveness) but believeth on him that justifieth the ungodly, his faith (shown by obedience) is counted for righteousness.
You can confirm this by asking yourself "What were the "works" required in the Law and Prophets for forgiveness before "After those days"?"
Did Moses say "If a man sins, he shall love his neighbor as himself, and his sin is forgiven"? Did Moses say "If a man sins, he shall Love the Lord your God with all your heart and your sins are forgiven"?
Are these the "works of the Law" of Justification Moses gave?
No. Moses said;
Lev. 4:
27 And if any one of the common people sin through ignorance, while he doeth somewhat against any of the commandments of the LORD concerning things which ought not to be done, and be guilty; 28 Or if his sin, which he hath sinned, come to his knowledge: then he shall bring his offering, a kid of the goats, a female without blemish, for his sin which he hath sinned.
29 And he shall lay his hand upon the head of the sin offering, and slay the sin offering in the place of the burnt offering.
30 And the priest shall take of the blood thereof with his finger, and put it upon the horns of the altar of burnt offering, and shall pour out all the blood thereof at the bottom of the altar. 31 And he shall take away all the fat thereof, as the fat is taken away from off the sacrifice of peace offerings; and the priest shall burn it upon the altar for a sweet savour unto the LORD; and the priest shall make an atonement for him, and it shall be forgiven him.
These are the "Works" Paul is talking about when he speaks to "works of the law" for justification.
As prophesied, the religions of this world, that is, those "many" who come in Jesus' Name, are teaching falsehoods about the Scriptures. Take heed you are not deceived by them as Jesus instructs.
The Covenant that changed was the Priesthood Covenant God made with Levi. the "LAW" that changed was the Law that said only a Levite could partake of the Priesthood. Jesus was from Judah. (Heb. 7)
I like your posts, and your perspective. Please consider this answer, and engage about it with me.
Thanks for the question.