One of the most miraculous parts of the Tabernacle was the altar. For when God bade Moses make an altar of shittim wood and overlay it with brass, Moses said to God: "O Lord of the world! Thou badest me make the altar of wood and overlay it with brass, but Thou didst also bid me have 'a fire kept burning upon the altar continually.' Will not the fire destroy the overlay of brass, and then consume the wood of the altar?"
God replied: "Moses, thou judgest by the laws that apply to men, but will these also apply to Me? Behold, the angels that are of burning flame. Beside them are My store-houses of snow and My store-houses of hail. Doth the water quench their fire, or doth their fire consume the water?
Behold, also, the Hayyot that are of fire. Above their heads extends a terrible sea of ice that no mortal can traverse in less than five hundred years. Yet doth the water quench their fire, or doth their fire consume the water? For, 'I am the Lord who maketh peace between these elements in My high places.'
But thou, because I have bidden thee to have 'a fire kept burning upon the altar continually,' art afraid that the wood might be consumed by the fire. Dead things come before Me, and leave Me imbued with life, and thou are afraid the wood of the altar might be consumed! Thine own experience should by now have taught thee better; thou didst pierce the fiery chambers of heaven, thou didst enter among the fiery hosts on high, yea, thou didst even approach Me, that 'am a consuming fire.'
Surely thou shouldst then have been consumed by fire, but thou wert unscathed because thou didst go into the fire at My command; no more shall the brass overlay of the altar be injured by fire, even though it be no thicker than a denarium."