2 Corinthians 3:6 (KJV) Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life. The old covenant or law killed; the new covenant gives life. How does the law kill? There are two ways.
First, when society sets a law before a man, he has to obey it. If he fails to obey it, he breaks and severs his relationship with society and he has to bear the punishment of a broken and severed relationship. He has to be put away, cut off, separated from society. The punishment for breaking God’s law is the same: when a man breaks God’s law, he breaks and severs his relationship with God. He cuts himself off from God; he has no relationship, no connection, no life with God. The law kills him, his relationship and life with God.
Second, the law is only letters and words written on paper, stone, or wood. It is external and outside man. It only commands; it does not give man the power to do the command. The will, ability, and power to obey are entirely left up to the man. The man may wish to keep the commandment, but he may not have the will or power to keep it. Therefore, he breaks the law, and the law kills him. It should be noted that the law not only kills man eternally, but through guilt and despair, it kills his human spirit and will, sapping his energy, ambition, drive, and hope.
The new covenant: Hebrews 8:10-12 (KJV)
For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:  And they shall not teach every man his neighbor, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest.  For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.
Upward Bound Ministries Church on the Rock 1049 Richmond Rd. Berea, Kentucky 40403 859-986-1650