Hilary of Poitiers

(v. de Tr. 3) But it must be clear to every one that the reality of any thing is evidenced by its power. For that is true wheat, which when rising with grain and fenced with ears, and shaken out by the winnowing machine, and ground into corn, and baked into bread, and taken for food, fulfils the nature and function of bread. I ask then wherein the truth of Divinity is wanting to the Son, Who hath the nature and virtue of Divinity. For He so made use of the virtue of His nature, as to cause to be things which were not, and to do every thing which seemed good to Him.