JESUS - Hebrews 8:6

But in fact the ministry Jesus has received is as superior to theirs as the covenant of which he is mediator is superior to the old one, since the new covenant is established on better promises. 

But in fact the ministry Jesus has received is as superior to theirs as the covenant 
Hebrews 8:7-13  For if there had been nothing wrong with that first covenant, no place would have been sought for another. But God found fault with the people and said: "The days are coming, declares the Lord, when I will make a new covenant with the people of Israel and with the people of Judah. It will not be like the covenant I made with their ancestors when I took them by the hand to lead them out of Egypt, because they did not remain faithful to my covenant, and I turned away from them, declares the Lord. This is the covenant I will establish with the people of Israel after that time, declares the Lord. I will put my laws in their minds and write them on their hearts. I will be their God, and they will be my people. No longer will they teach their neighbor, or say to one another, 'Know the Lord,' because they will all know me, from the least of them to the greatest. For I will forgive their wickedness and will remember their sins no more." (Jeremiah 31:31-34) By calling this covenant "new," he has made the first one obsolete; and what is obsolete and outdated will soon disappear.
Luke 22:20  In the same way, after the supper he took the cup, saying, "This cup is the new covenant in my blood, which is poured out for you."

of which he is the mediator 
Galatians 3:20  A mediator, however, implies more than one party; but God is one.
1 Timothy 2:5-6  For there is one God and one mediator between God and mankind, the man Christ Jesus, who gave himself as a ransom for all people. This has now been witnessed to at the proper time.
Hebrews 9:15  For this reason Christ is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance--now that he has died as a ransom to set them free from the sins committed under the first covenant.

(parentheses are mine)

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