This issue is tantamount to truly understanding God and Christianity. If this issue could ever be resolved, between denominations, then perhaps we can stand as a united front and be of one belief. Will this post do it, no it won't, but it may spark an interest in truly studying the Bible for the answer. I encourage all to read and discover for yourself the Truths that are in the Holy Word of God.
There is more difference in the Old and New Testament, then just a blank page. This is huge, the Old Testament shows us life under the Old Covenant, this is before Our Savior came and while God had wrath against those who sinned. These were the days when God cursed mankind, as is fully made known in Deuteronomy 28 this chapter deals with the blessings and cursings that God dealt out. In psalms David himself expresses how fortunate those are when God no longer impunes our sins to us and longed to see it. That is us! We no longer have to sacrifice animals every time we sin and then once every year for all the sins of that year. Why? Because Christ is our Lamb, once and for all. The Sabath day was done away with, in fact all of the Old Covenant traditions were done away with, by Jesus. The Day Jesus was born the Angels appeared to the shepherds with a message. Luke 2:14 "Glory to God in the highest and on earth peace, good will towards men" We know this message was not peace "between men", for Jesus stated that he did not come to bring peace on earth Matthew 10:34-38. No, the angels message was that the Glad Tidings was that with Jesus' birth, that God was at Peace with Man..........A new Covenant. The debt has been paid in full. If the Law had not been fulfilled Jesus would have let the Pharisees stone the adultress woman. If the Law had not been fulfilled than when John and James asked Jesus if they should be fire down on Samaria as Elijah did on the prophets of baal, then Jesus would have allowed it. Also, if God still held to the curses of the Old Covenant then Jesus would not have commanded the disciples to heal the sick Luke 9:2 And He sent them to preach of the kingdom of God, and to heal the sick!" For then their sickness would have been sent directly from God (curses). He would have stated that to heal the sicknesses that were not curses sent by God! Romans 5:1 "Therefore being justified by faith, we have peace with God through our Lord Jesus Christ" Romans 5:9-11 Much more then, being now justified by his blood, we shall be saved from wrath through him. 10 For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life. And not only so, but we also joy in God through our Lord Jesus Christ, by whom we have now received the atonement." Paul again and again confirms this fact, that Jesus' fulfilled the Law. The Old Testament is vital and should be studied, but with the realization that it is the Old Covenant. The New Testament is the New Covenant, Jesus had to teach the disciples, because it was NEW, meaning it had never existed, before. Ponder this.........Before the Mosiac Law (prior to the Ten Commandments) God did not impune sin unto men. In fact He protected the first murderer from mankind and did not impune his sin to him. He seperated himself from cain, but did not impune his sin to him. Then came the Mosiac Law and God impuned man's sin onto us and His Wrath was upon those who sinned. Then Came The New Covenant and now when we Accept Christ and His Sacrifice, he does not impune sin unto us. Yes, there were three seperate stages of how God dealt with mankind! Sin is death, this is not a license to sin, it does lead to death of the physical body and opens a door for Satan. Sin also seperates us from God, Not because God is mad or angry at us, it's because we seperate ourselves from Him. Corinthians 5:5 5 "deliver such a one unto Satan for the destruction of the flesh, that the spirit may be saved in the Day of the Lord Jesus." Notice the distinction between the flesh and the spirit." I pray that all will read the Bible and learn, Love and Live it. The study of the Bible, is the renewing of the mind, and then and only then can the spirit and mind come together to force the corrupted body to submit.