<p>9:15 <i>And because of this, he is the mediator of a new covenant; that a death having taken place for the redemption of the transgressions that were under the first covenant, they that have been called may receive the promise of the eternal inheritance</i>- The Lord's ability to cleanse even the conscience of believers through His total eradication of sin is what makes Him the mediator of the new covenant, even though that new covenant was comprised of the promises made to Abraham and his seed the Lord Jesus of eternal inheritance of the earth. By association with the representative sacrifice of the Lord Jesus, we can become &quot;in Him&quot;, we become the seed, and thereby the promises to Abraham and Jesus are made to us. His sacrifice thereby enabled us to receive the promise of eternal inheritance- the promise made to Abraham. His death was also the basis for the salvation of those who sought forgiveness under the old covenant; for the blood of animals of itself could not take away sin. It was only effective insofar as it pointed forward to the Lord's future sacrifice.</p><p>It must be remembered that the High Priest of the Old Covenant did not offer up the prayers of the people. Yahweh's ears were ever open to the cry of the individual Israelite, without an intercessor. Moses mediated the Old Covenant in the sense that he obtained it and relayed it to Israel; his mediation was a one-off act. This is the basis of the NT passages concerning the mediation of the New Covenant through Christ; He did this through His death and resurrection (Gal. 3:19,20; Heb. 8:6; 9:15; 12:24). Christ was the mediator of the new covenant so that the sins committed under the old covenant could be forgiven; thus His mediation is not in the relaying of our words to God, but in the sealing of the new covenant through His own blood. The mediation between God and man by the Lord is paralleled with His giving Himself as a ransom on the cross (1 Tim. 2:5,6). This is the sense in which He is the mediator of the new covenant; He mediated it <i>once</i>, not in an ongoing sense.</p>