20. When then was God without that which is proper to Him? or how can a man consider that which is proper, as foreign and alien in essence? for other things, according to the nature of things originate, are without likeness in essence with the Maker; but are external to Him, made by the Word at His grace and will, and thus admit of ceasing to be, if it so pleases Him who made them; for such is the nature of things originate. But as to what is proper to the Father’s essence (for this we have already found to be the Son), what daring is it in irreligion to say that ‘This comes from nothing,’ and that ‘It was not before generation,’ but was adventitious, and can at some time cease to be again? Let a person only dwell upon this thought, and he will discern how the perfection and the plenitude of the Father’s essence is impaired by this heresy; however, he will see its unseemliness still more clearly, if he considers that the Son is the Image and Radiance of the Father, and Expression, and Truth. For if, when Light exists, there be withal its Image, viz. Radiance, and, a Subsistence existing, there be of it the entire Expression, and, a Father existing, there be His Truth (viz. the Son); let them consider what depths of irreligion they fall into, who make time the measure of the Image and Form of the Godhead. For if the Son was not before His generation, Truth was not always in God, which it were a sin to say; for, since the Father was, there was ever in Him the Truth, which is the Son, who says, ‘I am the Truth.’ And the Subsistence existing, of course there was forthwith its Expression and Image; for God’s Image is not delineated from without, but God Himself hath begotten it; in which seeing Himself, He has delight, as the Son Himself says, ‘I was His delight.’ When then did the Father not see Himself in His own Image? or when had He not delight, that a man should dare to say, ‘the Image is out of nothing,’ and ‘The Father had not delight before the Image was originated?’ and how should the Maker and Creator see Himself in a created and originated essence? for such as is the Father, such must be the Image.