(For they could not endure that which was commanded, And if so much as a beast touch the mountain, it shall be stoned, or thrust through with a dart: 21And so terrible was the sight, that Moses said, I exceedingly fear and quake:) " (Hebrews 12: 20-21)
Even today, men and women in the Body of Christ believe that we must live by the Ten Commandments.
The writer of Hebrews could not have made it clearer: "they could not endured what was commanded."
The Ten Commandments is a ministration of death:
"Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God; 6Who 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." (2 Corinthians 3: 5-6)
In fact, the law was brought in to show that we cannot be self-sufficient, but that we need God for all things:
"20Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound: 21That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord." (Romans 5: 20-21)
We reign in life when we understand that we have no life of ourselves to live.
How to we live? By faith in Him!
"For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith." (Romans 1: 17)
"I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me." (Galatians 2: 20)
We do not live by the law:
"And the law is not of faith: but, The man that doeth them shall live in them." (Galatians 3: 12)
No one can live at Mount Sinai, but praise Jesus we are not called to live there in the first place!