I would like to look at other texts to see how this compares because, while most writers agree that God is not physical, if they are including Jesus in their definition of God it becomes more complicated because of the Incarnation. I wonder why in this section the author doesn't reference the physical nature of God in the form of Jesus. If the idea of the incarnation was still in dispute at this point, maybe Athenagoras shared beliefs with Docetism?? Or maybe he is just discussing the immaterial God for the sake of supporting his argument that Christians acknowledge on God. What would he make of the father, son, and holy spirit? I will look for more on this further in the text.