The philosophers, as you know, call God the First Cause (in Hebrew ʻillah and sibbah): but those who are known by the name of Mutakallemim are very much opposed to the use of that name, and call Him Agens, believing that there is a great difference whether we say that God is the Cause or that He is the Agens. They argue thus: If we say that God is the Cause, the coexistence of the Cause with that which was produced by that Cause would necessarily be implied; this again would involve the belief that the Universe was eternal, and that it was inseparable from God. When, however, we say that God is the Agens, the co-existence of the Agens with its product is not implied; for the agens can exist anterior to its product; we cannot even imagine how an agens can be in action unless it existed before its own production. This is an argument advanced by persons who do not distinguish between the potential and the actual. You, however, should know that in this case there is no difference whether you employ the term “cause” or “agens”; for if you take the term “cause” in the sense of a mere potentiality, it precedes its effect; but if you mean the cause in action, then the effect must necessarily co-exist with the cause in action. The same is the case with the agens; take it as an agens in reality, the work must necessarily co-exist with its agens. For the builder, before he builds the house, is not in reality a builder, but has the faculty for building a house—in the same way as the materials for the house before it is being built are merely in potentiâ—but when the house has been built, he is the builder in reality, and his product must likewise be in actual existence. Nothing is therefore gained by choosing the term “agens” and rejecting the term “cause.” My object here is to show that these two terms are equal, and in the same manner as we call God an Agens, although the work does not yet exist, only because there is no hindrance or obstacle which might prevent Him from doing it whenever He pleases, we may also call Him the Cause, although the effect may not yet be in existence.