After the incident of the golden calf Adonai wants to destroy the children of Israel and build a nation from Moses alone. However, Moses stands in the gap for the people. He takes it upon himself to intercede for his people.
Moses goes up the mountain a second time to intercede and to obtain a second set of tablets. According to Jewish history he goes up the mountain the second time on Elul 1. He stays for 40 days hence making his return back down the mountain occur on the very day of Yom Kippur. When the people see him his face is shining bright from having been in the presence of The Almighty.
It is from this event that the Hebrew people understood atonement. It is from this incident of Moses’ two trips up, then down the mountain, that many Messianic see the two comings of Yeshua.
As we look at the day of Yom Kippur we see that it foreshadows the work done by Yeshua the Messiah. He also stood as an intercessor for His people and became the Yom Kippur sacrifice. He entered the Holy of Holies only once (with His blood offering) and then sat down at the right hand of His Father; having now become the High Priest. We see Him ministering as High Priest in the heavenly tabernacle in the book of Revelation.
In the Newer Testament we are told about the transfiguration that takes place on the mountain (please read my article here so I don’t have to repeat all of this):
On one Yom Kippur in the future Yeshua will descend from heaven and His feet will touch the earth. His face and entire being will be radiating with majestic light unlike any light this earth has to offer. Just like the people fled from the radiant glow of Moses’ face, so that he had to cover his face with a veil, likewise people will flee from the presence of the Almighty and try to hide from His presence.
Just as Peter, James, and John saw Yeshua’s coming in the future, in all of His majestic glory - we will see Him - every eye will see and every knee will bow before Him on the day of His appearing.
I can’t wait for the return of The King!