very complicated and has to do with the " legality" of jesus's ransom sacrifice..
i read at beliefnet.com and this has been discussed lately..heres one guys explanation.
The mediatorship of Jesus can be compared to that of Moses, Jesus being the greater Moses.
Remember that Jehovah told Abraham "by means of your seed all the nations (or "all the families of the ground"-- in another scripture) will bless themselves.
Moses mediated the Law covenant between the Jews (Abraham's offspring) and Jehovah God. There's a scripture that speaks of him as mediator of that covenant.
Another scripture explains that by making the covenant with ONLY the Jews, (a relatively small group compared to the rest of the world) Jehovah "Had not done that way to any other people."
Still another scripture explains that if the Jews "strictly obeyed [God's] voice they would become to him "a nation of kings and priests", or very similar wording.
Well, we know they didn't obey. So fast-forward to Jesus's time.
The night Jesus died, he made a covenant with his faithful disciples. "for a Kingdom" and told them they would "sit on thrones and judge the twelve tribes of Israel".
Paul later said to the Christians of his time: "Do you not know that the holy ones will judge the world?"
Peter later said that they were "a royal priesthood."
Paul pointed out that "not all who spring from Israel are really Israel", showing that Jehovah had opened that covenant for the kingdom to non-Jews.
Paul pointed out to the Galatians, who were gentiles, that not those who adhere to the Law covenant, but "those who adhere to faith are the sons of Abraham" and they are "are heirs with reference to a promise.". He went on further to say "by means of you all the nations will be blessed" --Galatians 3:1-8.
So we see that the ones chosen to be in the covenant are a small group in relation to the rest of the world. And we also see how the respective mediatorships worked in relationship to the rest of the people on earth.
(And to any non-Witness reading this, we also see that there would be blessings for others of mankind from this arrangement.)
Which brings up a scripture in Hebrews; in which Paul talks about the "great cloud of witnesses" like Abraham, Moses, Joshuah, Joseph, Rahab and others who were stoned, sawn asunder, had relatives resurrected, went around in sheep and goatskins, in want and tribulation and of whom the world was not worthy, "did not get the fufillment of the promise. As God saw something better for us, in order that they may not be made perfect apart (or, "without" us.--Hebrews 11:4- 12:1.
So the small group of anointed, while not mediators between Jehovah and the rest of faithful mankind, do work on behalf of them to bring them to perfection. There are a lot of scriptures in Revelation which--as I'm sure you already know--explain how they go about that..............
Jesus is our high priest. That is how we come to Jehovah through him. He is also our king. These two jobs have nothing to do with his job as mediator of the covenant for a kingdom between Jehovah and the 144,000. Are you one of the annointed? If not, then you are not part of the covenant and therefore do not need a mediator.
However, if like me your hope is to live forever on earth, then we both absolutely come to Jehovah through Jesus Christ our Lord because he is our high priest and king. The faithful and discreet slave have nothing to do with that.
