The Power of the Cross.
So that the Law served [to us Jews] as our trainer [our guardian, our guide to Christ, to lead us] until Christ [came], that we might be justified (declared righteous, put in right standing with God) by and through faith.
But now that the faith has come, we are no longer under a trainer (the guardian of our childhood).(Gal 3:24-25 amp)
When we are born again by confessing with our mouth that Jesus is Lord and believing in our heart, we receive Jesus Christ as Lord of our life (Rom 10:9), we are no longer under the law, but are made in right standing with God in Christ.
But what is the law?
In the Old Testament, God made an agreement (called a covenant) with Abram (subsequently called Abraham, which means father of many nations (Gen 15:18-21))
Following this, God gave the people Ten Commandments to live by (Ex 20), later a series of laws were introduced by Moses (called the law of Moses ((Ex 34:28, Deut 4:13) )
The purpose of the Law of Moses was to amplify the Ten Commandments and provide enhanced guidelines for God's people, on how they were expected to live.
Under the Law the lives of the Jewish people were to be led by the law, it was intended to bring an awareness of sin.
For more on the Law of Moses, see the section on covenant.
In the New covenant people should now be led by the Holy Spirit.
Under the law there were very clear guidelines, e.g. don't kill, don't steal, don't commit fornication (physical sex outside of the marriage covenant.).
In the new covenant, we are led in the faith of Christ by the Holy Sprit, who will say to us things such as, don't talk to people that way, that is not love, don't take those pencils from your employer, that is not right, give your wife a hug this morning.
The Holy Spirit wants to lead and guide us into all truth (the revealing of truth, truth is the person of Jesus Christ. (John 1:17)).
For while the Law was given through Moses, grace (unearned, undeserved favor and spiritual blessing) and truth came through Jesus Christ. (John 1:17)
The Law acted as a tutor to the Jewish people and before we are saved we are also under the Law.
The Law was and is intended to convict us of our need of a saviour (Gal 3:24) that we may be led into Christ, to be declared justified (made right with God) through His faith.(Gal 3:27)
When we are born again we are now heirs to the promise of God.
What is the Promise of God?
For the promise to Abraham or his posterity (future generations of people.), that he should inherit the world, did not come through [observing the commands of] the Law but through the righteousness of faith.(Rom 4:13 amp)
Therefore, [inheriting] the promise is the outcome of faith and depends [entirely] on faith, in order that it might be given as an act of grace (unmerited favor) (Rom 4:16 amp)
Now that we are reconciled (justified, made right with God) back to God, we are to rule and reign in Christ, who rules and reigns over spiritual forces opposite to God (Luk 20:43) .
When we walk in Christ, we operate in Him in the Kingdom of God's system. (Matt 28:18-19)
But why was reconciliation needed?
God's creation was perfect, the Devil tempted the first man and through Adam's disbelief of God and what God had said (Gen 2:15-17), sin entered and was spread throughout the world (Rom 5:12)
This original sin of disbelief is carried down to each generation and is present within us all.
This original sin, which the bible calls the nature of sin (Col 2:13 amp) separates us from God, just as Adam and Eve were separated from God when they were driven out of the Garden of Eden (If they had not been driven out they would have spent eternity in a fallen state, separated from God).
In His First Fall, Satan Lost his exalted Position in God
How art thou fallen from heaven, O Lucifer, son of the morning! How art thou cut down to the ground, which didst weaken the nations!
For thou hast said in thine heart, I will ascend into heaven.
I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
I will ascend above the heights of the clouds: I will be like the most High. (Isaiah 14:12-15:)
Satan tempted Adam through Eve, in order to steal the authority that God had given to Adam (Gen 1:26, 28)
In His Second Fall, Satan Lost His Authority in God
In the second fall of Satan, he lost his authority. The authority Satan operated in before the cross was stolen authority. He stole that authority from Adam and Eve. He deceived them and took it from them. But Jesus took back that authority legally. No deception was involved.
Satan now, through stolen authority, operates on the earth through sin, in sons of disobedience, he operates through us when we choose to disbelieve God.(Rom 6:16)
In which at one time you walked [habitually]. You were following the course andfashion of this world [were under the sway of the tendency of this present age], following the prince of the power of the air.
[You were obedient to and under the control of] the [demon] spirit that still constantly works in the sons of disobedience [the careless, the rebellious, and the unbelieving, who go against the purposes of God].(Eph 2:2 amp)
Full Authority and Dominion Was Won Back By Jesus at Calvary (Hebrews 2:5-8)
Now, this separation between ourselves and God is permanent in the world, because there is no way to be reconciled back to God, through anything we can do. (Rom 3:23)
However, Jesus led a perfect sinless life and through His death on the cross and the shedding of His blood, we are reconciled and made right with God in Christ.
This means that we are now reconciled (made right with) and can stand before God, in Christ who is totally righteous. When we stand in Him by His faith we are deemed (considered by God as) righteous, as He is righteous.(Heb 4:16, 1 Cor 1:30)
We receive reconciliation and are made right with God the moment we declare that Jesus is Lord of our life and believe in our heart (Rom 10:9) we are now saved from the penalties of sin and death and stand in His righteousness.
We are to daily stand in Him, by His faith standing in the word, made possible through the Holy Spirit. (Matt 16:24, John 15)
If we [freely] admit that we have sinned and confess our sins, He is faithful and just (true to His own nature and promises) and will forgive our sins [dismiss our lawlessness] and [continuously] cleanse us from all unrighteousness [everything not in conformity to His will in purpose, thought, and action]. (1 John 1:9)
For our sake He made Christ [virtually] to be sin Who knew no sin, so that in and through Him we might become [endued with, viewed as being in, and examples of] the righteousness of God [what we ought to be, approved and acceptable and in right relationship with Him, by His goodness] (2 Cor 5:21 amp)
Everyone who believes (adheres to, trusts, and relies on the fact) that Jesus is the Christ (the Messiah) is a born-again child of God; and everyone who loves the Father also loves the one born of Him (His offspring). (1 John 5:1)
This is the power of the message of the cross
For the story and message of the cross is sheer absurdity and folly to those who are perishing and on their way to perdition, but to us who are being saved it is the [manifestation of] the power of God. (1 Cor 1:18) amp