His works were finished from the foundation of the world.

Some Enter His Rest, While Others Don't. We can have hope in our salvation, for the Lord declared the beginning from the end; meaning He spoke from the ancient of days clear up until the end of time, with the profession that it will stand as He declared (Isaiah 46:10; Hebrews 4:3-4) for He is the Alpha and Omega, the beginning and the end (Revelation 22:13). And we know He rested from all His works on the seventh day (Genesis 2:2-3). This very rest was promised by God to those who believe (Hebrews 4:3; Exodus 33:14) and this rest still remains for some to enter (Hebrews 4:1, 4-6, 9-10). But frighteningly, He also declared, with an oath, others will never enter His rest (Psalm 95:11). Who are the ones to enter or not enter?

Jesus spoke again to the people, he said, “I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life.​​​

Jesus is the Mediator of the New Covenant. Christ is the eternal high priest of the New Covenant (New Testament). And Jesus said, I did not come to abolish the Law of Moses or the Prophets, I have come to fulfill them (Matthew 5:17); while adding, These are the very scriptures that testify about Me (John 5:39b). Jesus is the logos, the word of God, which became flesh and dwelt among us (John 1:1, 14; 6:51). By the word, the breath of the LORD's mouth, all things were made for Him and through Him, everything in heaven and on earth, visible and invisible, thrones or powers, rulers or authorities, and nothing that was made was made apart from Him (Psalm 33:6; John 1:2-5; Colossians 1:16). God made everything so that His glory would shine through people around the world, for to know His glory is to bring it forth (Numbers 14:21; Psalm 57:5; Habakkuk 2:14). An entire cosmic plan was established, throughout the ages, to bring this into being, which included the fall and rise of man through Adam and Jesus, respectfully (1 Corinthians 15:21; Romans 5:12-21).

But the LORD of hosts will be exalted in judgment, and the holy God will show Himself holy in righteousness.

The Eternal Abraham Covenant.  The Lord gave an unconditional covenant, the Abrahamic Covenant (Genesis 12:1-3; 15:1-17), to Abraham, Isaac and Jacob. This is the overarching covenant with Him as their God and them as His blessed and holy people living in a promised land. This covenant is eternal and solely depends upon the Lord to fulfill it, as it will bring glory to His name (Psalm 66:2). Shouldn't He already be receiving honor and glory? Yes, For God's invisible attributes; namely because His eternal power and divine nature are already made visible, since the creation of the world, in the things He created (Romans 1:19-20). So people already knew God, but they chose to not give Him honor or thanks (Romans 1:21-23). Therefore, God gave them up to the impurities and lusts of their hearts, to do as they pleased (Romans 1:24-25), but now He is calling these people back to Himself. But only for the Jews? No, for it is written, This mystery is that through the gospel the Gentiles are fellow heirs, fellow members of the body, and fellow partakers of the promise in Christ Jesus (Ephesians 3:6 BSB). For the promises were spoken to Abraham and his to his seed. Scripture does not say 'and to seeds,' meaning many people, but 'and to your seed,' meaning one person, who is the Christ (Galatians 3:16 NIV). God will be known and honored, not only by the Jews, but all the gentiles, the peoples of the world, for It is written, 'I live,' says the Lord, 'that every knee will bow to Me, and every tongue will confess to God (Romans 14:11 BLB) so that at the name of Jesus every knee will bow, in heaven and on earth and under the earth, and that every tongue will confess that Jesus Christ is Lord is Lord, to the glory of God the Father (Philippians 2:10-11 ESV). 

 I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel. For are severed from Christ, you who would be justified by the law; you have fallen away from grace. But I say, walk by the Spirit, and you will not gratify the desires of the flesh. But if you are led by the Spirit, you are not under the law.

The Gospel Message is Questioned. Along his path, Paul preached the good news of the freedom in Christ Jesus, that we are justified by faith not works of the law and gentiles are grafted into this salvation (Galatians 3:18, 22, 24; Romans 3:28; 5:1). In Antioch, a few false prophets quickly came to pervert the gospel message, by trying to lead people back into captivity under the law of Moses, by saying gentiles had to be circumcised. And the people feared for their salvation. Paul was astonished upon his return to see how quickly they deserted him by turning to another gospel (Galatians 1:6). He continues, not that there is another one, but there are some who trouble you and want to distort the gospel of Christ (Galatians 1:7). He explains twice for emphasis, that even if an angel from heaven preaches another gospel, let him be accursed  (Galatians 1:8-9). Paul is concerned about this error in teaching for he knows, A little leaven leavens the whole lump (Galatians 5:9) so believing just the smallest lie or deviance from the truth can affect your entire understanding of God.

 Why then the law? It was added because of transgressions, until the offspring should come to whom the promise had been made, and it was put in place through angels by an intermediary.

The Law was Give to Bind Sin and Set the Captive Free.  God wanted fellowship with man, and He made a promise to Abraham that it would happen, and all who believe will receive the promise. But before He could have fellowship, or even friendship, with mankind, He had to deal with our transgressions. His righteousness required Him to deal with our transgressions of His perfect and pure holiness. He accomplished this by giving us the law, which would first enslave us and then set us free (Galatians 3:22); but in doing so, it would make the whole world accountable to God (Romans 3:19). Through this process, instead of seeking our own hearts desires, which are desperately wicked (Genesis 6:5; Jeremiah 17:9; Romans 8:7; Philippians 2:21), now we could draw near to God (Hebrews 7:19) for love of the law (Psalm 119:97) for it is perfect (Psalms 19:7a). The law was perfect, but it made nothing perfect, because of the weakness of the flesh (Hebrews 7:18-19).

Understanding gospel foundation; from the Old to the New Testament

The New Testament (NT) is the fulfillment of the old covenant within the Old Testament (OT). The triumph is through faith (Ephesians 2:8), which is belief in Jesus Christ as the Son of God who came to take away the sins of the world (1 John 3:5; John 1:29), so you can be raised to life again at Jesus' second coming and enter the Kingdom of God (John 6:40). The promise was given to Abraham (Galatians 3:16), who is the father of the faith; which is God's promise to be our God and for us to be His people, endowed with blessings (Genesis 17:7; Exodus 6:7). It was fulfilled through the work of Jesus Christ, His beloved Son; when he took upon Himself the judgment due mankind, by crucifixion upon the cross, thereby ending the legal decree against all mankind (1 Peter 2:24; Colossians 2:13-14). Having never sinned, death could not hold Him, for death is the maturity of sin (1 Peter 2:22); so He was able to raise to life, body and spirit, to ascend into heaven to be seated at the right hand of God as our mediator (Mark 16:19; Ephesians 1:20). 

For this is the covenant that I will make with the house of Israel after those days, declares the Lord: I will put my laws into their minds, and write them on their hearts, and I will be their God, and they shall be my people.

God Has a Plan for Us. We were created by Him, for His purpose; He made a way for us to be back in fellowship with Himself and others. He gave a promise, through Abraham, to be our God and for us to be His people. A relationship of Him leading and us following, and obeying the truth of His word. He would even live in our hearts, speak to us and guide us into all truth. First He had to correct the wrongs of mankind, which was accomplished through the giving and fulfilling of the law. He is the light of man, and He wants to shine through us in this dark world.  We are like unleavened bread, for He will raise us up on the last day (John 6:44).

The Fulfillment of the Law is Your Freedom. We live in the 'age of grace' where mankind is at peace with God, for Jesus' death was to redeem mankind from the wrath of God against ungodliness (John 3:16) and it's available for all who believe. Believing that God sent His Son to free you from fear of death, fear of the enemy and fear of God's wrath is extraordinarily liberating! Jesus' work on the cross taught us that we have a protective Father in heaven who loves us, cares for us, and is watching over us. He has a plan and purpose for our lives and He will bring it to completion. He is involved; He is sovereign; and He is working all things together for our good.