From the preceding remarks it is clear that the belief in the existence of angels is connected with the belief in the Existence of God; and the belief in God and angels leads to the belief in Prophecy and in the truth of the Law.
In order to firmly establish this creed, God commanded [the Israelites] to make over the ark the form of two angels. The belief in the existence of angels is thus inculcated into the minds of the people, and this belief is in importance next to the belief in God's Existence; it leads us to believe in Prophecy and in the Law, and opposes idolatry.
If there had only been one figure of a cherub, the people would have been misled and would have mistaken it for God's image which was to be worshipped, in the fashion of the heathen; or they might have assumed that the angel [represented by the figure] was also a deity, and would thus have adopted a Dualism. By making two cherubim and distinctly declaring "the Lord is our God, the Lord is One," Moses clearly proclaimed the theory of the existence of a number of angels; he left no room for the error of considering those figures as deities, since [he declared that) God is one, and that He is the Creator of the angels, who are more than one.