From Institutes I.13.1
God’s nature is immeasurable and spiritual
The doctrine of Scripture concerning the immensity and the spirituality of the essence of God, should have the effect not only of dissipating the wild dreams of the vulgar, but also of refuting the subtleties of a profane philosophy.One of the ancients thought he spake shrewdly when he said that everything we see and everything we do not see is God, (Seneca). In this way he fancied that the Divinity was transfused into every separate portion of the world. But although God, in order to keep us within the bounds of soberness, treats sparingly of his essence, still, by the two attributes which I have mentioned, he at once suppresses all gross imaginations, and checks the audacity of the human mind. His immensity surely ought to deter us from measuring him by our sense, while his spiritual nature forbids us to indulge in carnal or earthly speculation concerning him. With the same view he frequently represents heaven as his dwelling-place. It is true, indeed, that as he is incomprehensible, he fills the earth also, but knowing that our minds are heavy and grovel on the earth, he raises us above the worlds that he may shake off our sluggishness and inactivity. And here we have a refutation of the error of the Manichees, who, by adopting two first principles, made the devil almost the equal of God. This, assuredly, was both to destroy his unity and restrict his immensity. Their attempt to pervert certain passages of Scripture proved their shameful ignorance, as the very nature of the error did their monstrous infatuation. The Anthropomorphites also, who dreamed of a corporeal God, because mouth, ears, eyes, hands, and feet, are often ascribed to him in Scripture, are easily refuted. For who is so devoid of intellect as not to understand that God, in so speaking, lisps with us as nurses are wont to do with little children? Such modes of expression, therefore, do not so much express what kind of a being God is, as accommodate the knowledge of him to our feebleness. In doing so, he must, of course, stoop far below his proper height.