Scripture seems clearly to point to the belief that God spoke Himself, having descended from heaven to Mount Sinai for the purpose—and not only that the Israelites heard Him speaking, but that their chief men beheld Him (Ex. xxiv.). Further, the laws of Moses which might neither be added to nor curtailed, and which was set up as a national standard of right, nowhere prescribed the belief that God is without body, or even without form or figure, but only ordained that the Jews should believe in His existence and worship Him alone: it forbade them to invent or fashion any likeness of the Deity, but this was to insure purity of service; because, never having seen God, they could not by means of images recall the likeness of God, but only the likeness of some created thing which might thus gradually take the place of God as the object of their adoration. Nevertheless, the Bible clearly implies that God has a form, and that Moses when he heard God speaking was permitted to behold it, or at least its hinder parts.
Doubtless some mystery lurks in this question which we will discuss more fully below. For the present I will call attention to the passages in Scripture indicating the means by which God has revealed His laws to man.
Revelation may be through figures only (as in 1 Chron. xxii.), where God displays his anger to David by means of an angel bearing a sword, and also in the story of Balaam.
Maimonides and others do indeed maintain that these and every other instance of angelic apparitions (e.g., to Manoah and to Abraham offering up Isaac) occurred during sleep, for that no one with his eyes open ever could see an angel, but this is mere nonsense. The sole object of such commentators seemed to be to extort from Scripture confirmations of Aristotelian quibbles and their own inventions, a proceeding which I regard as the acme of absurdity.
In figures, not real but existing only in the prophet's imagination, God revealed to Joseph his future lordship, and in words and figures He revealed to Joshua that He would fight for the Hebrews, causing to appear an angel, as it were the captain of the Lord's host, bearing a sword, and by this means communicating verbally. The forsaking of Israel by Providence was portrayed to Isaiah by a vision of the Lord, the thrice Holy, sitting on a very lofty throne, and the Hebrews, stained with the mire of their sins, sunk, as it were, in uncleanness, and thus as far as possible distant from God. The wretchedness of the people at the time was thus revealed, while future calamities were foretold in words. I could cite from Holy Writ many similar examples, but I think they are sufficiently well known already....
We may be able quite to comprehend that God can communicate immediately with man, for without the intervention of bodily means He communicates to our minds His essence; still, a man who can by pure intuition comprehend ideas which are neither contained in nor deducible from the foundations of our natural knowledge, must necessarily possess a mind far superior to those of his fellow men, nor do I believe that any have been so endowed save Christ. To Him the ordinances of God leading men to salvation were revealed directly without words or visions, so that God manifested Himself to the Apostles through the mind of Christ as He formerly did to Moses through the supernatural voice. In this sense the voice of Christ, like the voice which Moses heard, may be called the voice of God, and it may be said that the wisdom of God (i.e., wisdom more than human) took upon itself in Christ human nature, and that Christ was the way of salvation. I must at this juncture declare that those doctrines which certain churches put forward concerning Christ, I neither affirm nor deny, for I freely confess that I do not understand them. What I have just stated I gather from Scripture, where I never read that God appeared to Christ, or spoke to Christ, but that God was revealed to the Apostles through Christ; that Christ was the Way of Life, and that the old law was given through an angel, and not immediately by God; whence it follows that if Moses spoke with God face to face as a man speaks with his friend (i.e., by means of their two bodies) Christ communed with God mind to mind.[5]
Thus we may conclude that no one except Christ received the revelations of God without the aid of imagination, whether in words or vision. Therefore the power of prophecy implies not a peculiarly perfect mind, but a peculiarly vivid imagination....
If the Jews were at a loss to understand any phenomenon, or were ignorant of its cause, they referred it to God. Thus a storm was termed the chiding of God, thunder and lightning the arrows of God, for it was thought that God kept the winds confined in caves, His treasuries; thus differing merely in name from the Greek wind-god Eolus. In like manner miracles were called works of God, as being especially marvelous; though in reality, of course, all natural events are the works of God, and take place solely by His power. The Psalmist calls the miracles in Egypt the works of God, because the Hebrews found in them a way of safety which they had not looked for, and therefore especially marveled at.
As, then, unusual natural phenomena are called works of God, and trees of unusual size are called trees of God, we cannot wonder that very strong and tall men, though impious robbers and whoremongers, are in Genesis called sons of God.