A third approach suggests that the “image of God” is about the capacity to relate to God. To be created in the “image of God” is to possess the potential to enter into a relationship with God. The term “image” here expresses the idea that God has created humanity with a specific goal - namely, to relate to God. We are thus meant to exist in a relationship with our creator and redeemer. As the Oxford literary critic and writer C.S. Lewis argued, if we do not do this, there is an absence where there ought to be a presence. Following Blaise Pascal, he suggests that there is a God-shaped gap within us, which only God can fill. And in the absence of God, we experience a deep sense of longing - a longing which is really for God, but which fallen and sinful humanity misreads, accidentally or deliberately, as a longing for things within the world. And these things never satisfy. If we are made for God, and God alone, then there is nothing else that will satisfy. As Lewis constantly pointed out, this God-given sense of longing proves a key to answering the great questions of life with which humanity has wrestled.
Alister McGrath, Christianity: An Introduction (p. 135).