There was but one pillar of both cloud and fire (Exo 14:24); for even when shining in the dark, it is still called the pillar of cloud (Exo 14:19), or the cloud (Num 9:21); so that it was a cloud with a dark side and a bright one, causing darkness and also lighting the night (Exo 14:20), or “a cloud, and fire in it by night” (Exo 40:38). Consequently we have to imagine the cloud as the covering of the fire, so that by day it appeared as a dark cloud in contrast with the light of the sun, but by night as a fiery splendour, “a fire-look” (כּמראה־אשׁ, Num 9:15-16). When this cloud went before the army of Israel, it assumed the form of a column; so that by day it resembled a dark column of smoke rising up towards heaven, and by night a column of fire, to show the whole army what direction to take. But when it stood still above the tabernacle, or came down upon it, it most probably took the form of a round globe of cloud; and when it separated the Israelites from the Egyptians at the Red Sea, we have to imagine it spread out like a bank of cloud, forming, as it were, a dividing wall. In this cloud Jehovah, or the Angel of God, the visible representative of the invisible God under the Old Testament, was really present with the people of Israel, so that He spoke to Moses and gave him His commandments out of the cloud. In this, too, appeared “the glory of the Lord” (Exo 16:10; Exo 40:34; Num 17:7), the Shechinah of the later Jewish theology. The fire in the pillar of cloud was the same as that in which the Lord revealed Himself to Moses out of the bush, and afterwards descended upon Sinai amidst thunder and lightning in a thick cloud (Exo 19:16, Exo 19:18). It was a symbol of the “zeal of the Lord,” and therefore was enveloped in a cloud, which protected Israel by day from heat, sunstroke, and pestilence (Isa 4:5-6; Isa 49:10; Psa 91:5-6; Psa 121:6), and by night lighted up its path by its luminous splendour, and defended it from the terrors of the night and from all calamity (Psa 27:1., Psa 91:5-6); but which also threatened sudden destruction to those who murmured against God (Num 17:10), and sent out a devouring fire against the rebels and consumed them (Lev 10:2; Num 16:35). As Sartorius has aptly said, “We must by no means regard it as a mere appearance or a poetical figure, and just as little as a mere mechanical clothing of elementary forms, such, for example, as storm-clouds or natural fire. Just as little, too, must we suppose
