what does the new covenant? hebrews 9:15?

Eternal life...

"This is the record, that God has given to us eternal life, and this life in in His Son".... (I Jn. 5:11)

15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.

One eternal covenant seems to be an ok answer, but, in reality the chosen people fell away into apostacy from the first So Jesus gives us the new one and then he gives the New and everlasting covenant.

So, for all the world, we are now in the 3rd covenant, the last dispensation.

The new and everlasting covenent is in contrast with the old covenant of the sacrificial system of the priests in the temple. These priests would offer sacrifices first for themselves then for the sins of the nation of Israel. There work was Never done. There was no seat to sit down on.One priest would die and then a new one would come along. These sacrifices point to the sacrifice God would make once for all time. This sacrifice was offered by Jesus the sacrificial lamb of God- which was His very own body. Jesus unlike the priests that never were finished is our everlasting High Priest who offered and everlasting perfect sacrifice on the cross, and pronounced "it is finished" The God rose Him from the dead and "sat down" on the right hand of God. This is the new covenent of Christ that all who come to Him and accept His sacrifice will inherrit eternal life and live with God forever. Consequently Jesus being our High Priest makes intercession for His people to God the Father. Like a lawyer of a guilty party to the judge. They are innocent because He offered Himself as the pentalty that removes the charges and penalty. Read Heb. 7-9

It promises to those part of the new covenant to rule as kings and priests with Christ in the heavens. Made possible buy the ransom sacrifice of the Christ Jesus.

From the beginning to the end, from Father Adam to the last man, salvation is in Christ and in him only. "Salvation was, and is, and is to come, in and through the atoning blood of Christ, the Lord Omnipotent."

Thus Moses taught faith in Christ and prefigured-in the multitudinous rites and performances of his day-the shedding of our Lord's blood, through which alone salvation comes.

And thus Moses mediated between Israel and Jehovah, pleading with Deity on their behalf and offering sacrifices for sin in similitude of the coming sacrifice of God's Son. But Christ himself mediates between his saints and the Father, offering them remission of sins and salvation through his own infinite and eternal sacrifice. The law of Moses is the old covenant; the gospel is the new. Moses is the mediator of the old covenant; Jesus, of the new.

15-17. "In legal usage, a testator is one who leaves a valid will or testament at his death. The will or testament is the written document wherein the testator provides for the disposition of his property. As used in the gospel sense, a testament is a covenant. Jesus is the Mediator of the new covenant or testament, that is of the gospel which came to replace the law of Moses."

In these verses, Paul uses both the legal and the gospel definition of terms and teaches that it is through Christ's death that gifts are willed to men. "In other words, Christ had to die to bring salvation. The testament or covenant of salvation came in force because of the atonement worked out in connection with that death. Christ is the Testator. His gift, as would be true of any testator, cannot be inherited until his death. Christ died that salvation might come; without his death, he could not have willed either immortality or eternal life.

15. Mediator of the new testament] See 1 Tim. 2:1-7.

New Testament] New covenant, the gospel as restored by Jesus when contrasted with the Old Testament or old covenant which was revealed to Moses.

By means of death] Christ came to die for the sins of the world; his mission was to suffer for all men in Gethsemane and then to be lifted up upon the cross. His death and resurrection are the crowning events of his ministry. It is through death that life comes.

The redemption of the transgressions that were under the first testament] Christ's death saved men in Moses' day. The atonement was retroactive; it was for all men of all ages; its effect was past, present, and future. An angel declared that Christ's "blood atoneth for the sins of those who have fallen by the transgression of Adam," and that if "the children of men who lived before our Lord's mortal ministry "should believe that Christ should come, the same might receive remission of their sins, and rejoice with exceeding great joy, even as though he had already come among them."

First testament] In contrast with the gospel, the law of Moses was the first covenant of salvation and the gospel was the second; in fact, the gospel covenant was "first" given to Adam and was enjoyed by all the faithful saints who preceded Moses and that lesser law given to him.

Eternal inheritance] Eternal life, which is inherited through Christ's will, the legal "document" through which life's greatest blessings are bequeathed upon the death of the testator.

Salvation bought and paid for by the Life and death AND RESURRECTION OF THE SON ' THE ONLY BEGOTTEN of GOD Jesus ,Messiah , Light of the World!

John 3:16,17,18

Jesus Christ being the perfect sacrifice for sin; there was no need to return to the sacrificial system for man's sins.

It was the Birth, Death, and Resurrection of Jesus that changed everything. Now, we have a person that took our punishment that we deserved. Before Jesus came, we didn't have that.

There is no 'new' covenant. There is the eternal covenant between the Jews and G-d.

And other faiths all have their OWN covenants with G-d.