For we "...have come to Mount Zion and to the city of the living God, the heavenly Jerusalem..."
And here for the first time we meet Jesus, the Mediator of a New Covenant.
"... and to Jesus, the mediator of a new covenant..."
"For there is one God, and one mediator also between God and men, the man Christ Jesus, who gave Himself as a ransom for all, the testimony to be born at the proper time."
1 Timothy 2:5, 6
"For on the one hand, there is the setting aside of a former commandment because of its weakness and uselessness (for the law made nothing perfect) and on the other hand there is bringing in of a better hope, through which we draw near to God... so much the more also Jesus has become the guarantee of a better covenant... because He abides forever, holds His priesthood permanently. Hence... He is able to save forever (or completely) those who draw near to God through Him, since He always lives to make intercession for them."
Hebrews 7:18, 19, 22, 24, 25
The New Covenant
"...He, having offered one sacrifice for sins for all time, sat down at the right hand of God, waiting from that time onward until His enemies be made a footstool for His feet. For by one offering He has perfected for all time those who are sanctified. And the Holy Spirit also bears witness to us; for after saying,
'This is the covenant I will make with them,
After those days, says the Lord:
I will put My laws upon their heart,
And upon their minds I will write them,
And their sins and lawless deeds I will remember no more.'
Since therefore, brethren, we have confidence to enter the holy place by the blood of Jesus, by a new and living way which He inaugurated for us through the veil, that is His flesh, and since we have a great priest over the house of God, let us draw near with a sincere (Lit. true) heart in full assurance of faith, having our hearts sprinkled clean from an evil conscience and our bodies washed with pure water. Let us hold fast the confession of our hope without wavering, for He who promised is faithful..."