Archetypal and Ectypal Attributes
The attributes or perfections of God are generally distinguished as being communicable and incommunicable. All God's attributes, being His simple, essential Being itself, are equally incommunicable as far as their nature is concerned. This distinction is merely made for the purpose of comparison. God has created man in His image and likeness and again renews fallen, but elect, sinners according to that image, making them anew partakers of the divine nature. This does not imply that such a sinner becomes divine and is a partaker of the very being and attributes of God. From a divine perspective God is incommunicable, and finite man from his perspective cannot comprehend God's Being, the Godhead being infinite, simple, and thus indivisible. Therefore, if man in some measure were a partaker of the divine Being itself or of one of the divine attributes, he would consequently be a partaker of the entire Godhead itself, and thus man would be God. However, when we speak of the image and likeness of God in man, we are merely referring to a reflection of some of God's attributes, which are infinite, indivisible, and incommunicable in God Himself. There is some measure of congruency between these attributes and the image of God in man; however, not as if there were full equality, but merely by way of faint similitude.
Wilhelmus à Brakel, The Christian's Reasonable Service, ed. Joel R. Beeke, trans. Bartel Elshout, vol. 1 (Grand Rapids, MI: Reformation Heritage Books, 1992), 89-90.