My favorite quote on the image of God, by Herman Bavinck:

“The whole human person is the image of the whole deity.”

More in context:

“‘Image’ tells us that God is the archetype, humanity the ectype; ‘likeness’ adds the notion that the image corresponds in all parts to the original… This does not refer to certain attributes, either on God’s side or ours, such as the intellect or the soul, but rather that the whole human person is the image of the whole deity…”

“God. The whole being, the whole human person and not just “something” in us is the image of God…”
“It is important to insist that the whole person is the image of the whole God, that is, the triune God. The human soul, all the human faculties, the virtues of knowledge, righteousness, and holiness, and even the human body, all of it images God. Thus, a human being does not bear or have the image of God but is the image of God. As human beings we are the likeness or offspring of God (Gen. 1:26; 9:6; Luke 3:38; Acts 17:28; 1 Cor. 11:7; James 3:9). Therefore, God himself, the entire deity, is the archetype of man…”

“The image thus extends to the whole person; nothing is excluded, soul and body, all faculties and powers, in all conditions and relations. It is of course true that in the same way that God’s attributes are more clearly revealed in some creatures than others, so also the image of God comes out more clearly in one part of the human organism than another, more in the soul than in the body, more in the ethical virtues than in the physical powers. This does not alter the truth that the whole person is the image of the triune God…”

“So the whole human being is image and likeness of God, in soul and body, in all human faculties, powers, and gifts. Nothing in humanity is excluded from God’s image; it stretches as far as and constitutes our humanity and humanness. All that is in God—his spiritual essence, his virtues and perfections, his immanent self-distinctions, his self-communication and self-revelation in creation—finds its admittedly finite and limited analogy and likeness in humanity.”

Source: Reformed Dogmatics: Abridged in One Volume