1 John 4:7-12, John says "no one has ever seen God; but if we love one another, God lives in us and his love is made complete in us." Multiple times in John's gospel he says that no one has seen the father and has this idea of the "invisible" God that is made known in Jesus. In so far as we love one another, the image of God lives in us and in the world. It's like an atom...no one has ever seen an atom, but we have this picture that carries the idea.