The candlestick that Aaron lighted in the sanctuary, was not the common work of mortal hands, but was wrought by a miracle. When God bade Moses fashion a candlestick, he found it difficult to execute the command, not knowing how to set to work to construct it in all its complicated details. God therefore said to Moses: "I shall show thee a model." He then took white fire, red fire, and green fire, and black fire, and out these four kinds of fires He fashioned a candlestick with its bowls, its knops, and its flowers.
Even then Moses was not able to copy the candlestick, whereupon God drew its design upon his palm, saying to him: "look at this, and imitate the design I have drawn on thy palm." But even that did not suffice to teach Moses how to execute the commission, whereupon God bade him cast a talent of gold into the fire. Moses did as he was bidden, and the candlestick shaped itself out of the fire. As on this occasion, so upon other occasions also did God have to present the things tangibly before Moses in order to make certain laws intelligible to him.
In this way, for example, at the revelation concerning clean and unclean animals, God showed one specimen of each to Moses, saying: "This ye shall eat, and this ye shall not eat."