The Unity of God is demonstrated as follows: Two Gods would have been unable to produce the world; one would have impeded the work of the other. The two Beings would have one element in common, and would differ in another; each would thus consist of two elements, and would not be god. Both God’s would move to action by will; the will, being without a substratum, could not act simultaneously in two separate beings.
Therefore, the existence of one God is proved; the existence of a second God is not proved, even if it were possible, possibility is inapplicable to God. Therefore, there is no such a thing as a second God.
The possibility of ascertaining the existence of God is here confounded with potentiality of existence. Again, if one God suffices, the second God is superfluous; if one God is not sufficient, he is not perfect, and cannot be a deity.
Now, mind you that the absolutely One God is incorporeal too. If God were corporeal, He would consist of atoms, and would not be one; or He would be comparable to other beings.
Since comparison implies the existence of similar and of dissimilar elements, God would thus not be one. A corporeal God would be finite, and an external power would be required to define those limits.
Therefore, as you state above our Jewish confession, God is absolutely One and the Only Lord.
Ben: