6. Let us now see how we are to understand the expression “invisible image,” that we may in this way perceive how God is rightly called the Father of His Son; and let us, in the first place, draw our conclusions from what are customarily called images among men. That is sometimes called an image which is painted or sculptured on some material substance, such as wood or stone; and sometimes a child is called the image of his parent, when the features of the child in no respect belie their resemblance to the father. I think, therefore, that that man who was formed after the image and likeness of God may be fittingly compared to the first illustration. Respecting him, however, we shall see more precisely, God willing, when we come to expound the passage in Genesis. But the image of the Son of God, of whom we are now speaking, may be compared to the second of the above examples, even in respect of this, that He is the invisible image of the invisible God, in the same manner as we say, according to the sacred history, that the image of Adam is his son Seth. The words are, “And Adam begat Seth in his own likeness, and after his own image.”[57] Now this image contains the unity of nature and substance belonging to Father and Son. For if the Son do, in like manner, all those things which the Father doth, then, in virtue of the Son doing all things like the Father, is the image of the Father formed in the Son, who is born of Him, like an act of His will proceeding from the mind. And I am therefore of opinion that the will of the Father ought alone to be sufficient for the existence of that which He wishes to exist. For in the exercise of His will He employs no other way than that which is made known by the counsel of His will. And thus also the existence[58] of the Son is generated by Him. For this point must above all others be maintained by those who allow nothing to be unbegotten, _i.e._ unborn, save God the Father only. And we must be careful not to fall into the absurdities of those who picture to themselves certain emanations, so as to divide the divine nature into parts, and who divide God the Father as far as they can, since even to entertain the remotest suspicion of such a thing regarding an incorporeal being is not only the height of impiety, but a mark of the greatest folly, it being most remote from any intelligent conception that there should be any physical division of any incorporeal nature. Rather, therefore, as an act of the will proceeds from the understanding, and neither cuts off any part nor is separated or divided from it, so after some such fashion is the Father to be supposed as having begotten the Son, His own image; namely, so that, as He is Himself invisible by nature, He also begat an image that was invisible. For the Son is the Word, and therefore we are not to understand that anything in Him is cognisable by the senses. He is wisdom, and in wisdom there can be no suspicion of anything corporeal. He is the true light,