We read in Exodus vi. 3, "And I appeared unto Abraham, unto Isaac, and unto Jacob, by the name of God Almighty; but by my name Jehovah was I not known to them." Also Luke xx. 37, 38, "Now that the dead are raised, even Moses shewed at the bush, when he calleth the Lord the God of Abraham, and the God of Isaac, and the God of Jacob, for he is not a God of the dead, but of the living: for all live unto him."
This scripture shows how the few who had a higher conception of the Supreme Being as omnipotent Good, led nations, worked miracles, (to mortal mind) and prophesied of the true God to be manifest in the flesh.
Four thousand years of bondage to material sense, and its laws, had closed the eyes, and dimmed the understanding of mortals, and when this Saviour came he was repulsed, nor would they come unto him that they might have Life.