In Luke 19:10 Jesus explains his mission, “For the Son of Man came to seek and to save the lost.” So the story moves from God revealing himself through a myriad of ways, ultimately finding its completion in the God-man, Jesus, to the realization of Gods intent behind it all, “to seek and save the lost”.
Salvation has come, in the form of a suffering servant, who is out to capture those souls that would otherwise be lost. The reality is that from the beginning of the revelation of God there has been a reality that sin leads to judgment, and sin dealt with justly brings about death. So God knowing this gave man the law, not a law that would make them righteous but a law that would reveal to them there sin and ultimately there need for a savior.
We see this truth in Romans 3:20 as Paul writes “For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin.” Yet even in the face of this truth, a truth that alone would lead to sorrow, God has a plan. In Romans 8: 1-4 “There is therefore now no condemnation for those who are in Christ Jesus. For the law of the Spirit of life has set you, free in Christ Jesus from the law of sin and death. For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh, in order that the righteous requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit.”
So Jesus fulfills the laws requirement, through his perfect life, paying the debt for the worlds sin, through his sacrificial death, and offering to all men life new life, by his miraculous resurrection, all that those who were estranged because of there sin may return to perfect relationship with there loving Creator, for this is truly life.
Further Reading: The Explicit Gospel by Matt Chandler, What Is The Gospel by Greg Gilbert, Putting Amazing Back Into Grace by Michael Horton
Grace and Peace,