When, on that memorable Day of Atonement, God indicated His forgiveness to Israel with the words, "I have forgiven them according as I have spoken," Moses said: "I now feel convinced that Thou hast forgiven Israel, but I wish Thou wouldst show the nations also that Thou are reconciled with Israel." For these were saying: "How can a nation that heard God's word on Sinai, 'Thou shalt have no other gods before Me,' and that forty days later called out to the Calf, 'This is thy god, O Israel,' expect that God would ever be reconciled to them?"
God therefore said to Moses: "As truly as thou livest, I will let My Shekinah dwell among them, so that all my know that I have forgiven Israel. My sanctuary in their midst will be a testimony of My forgiveness of their sins, and hence it may well be called a 'Tabernacle of Testimony.'"