Tertullian

“ For Spirit has a bodily substance of its own kind, in its own form. [22] Now, even if invisible things, whatsoever they be, have both their substance and their form in God, whereby they are visible to God alone, how much more shall that which has been sent forth from His substance not be without substance! Whatever, therefore, was the substance of the Word that I designate a Person, I claim for it the name of Son; and while I recognize the Son, I assert His distinction as second to the Father. [23] ”

“ Nor need we dwell any longer on this point, as if it were not the very Word Himself, who is spoken of under the name both of Wisdom and of Reason, and of the entire Divine Soul and Spirit. He became also the Son of God, and was begotten when He proceeded forth from Him. ”

“ How could He who is empty have made things which are solid, and He who is void have made things which are full, and He who is incorporeal have made things which have body? For although a thing may sometimes be made different from him by whom it is made, yet nothing can be made by that which is a void and empty thing. ”