Today is the feast of St. Athanasius of Alexandria, Doctor of the Church. From his work On the Incarnation (Chapter 7):
A man's personality actuates and quickens his whole body. If anyone said it was unsuitable for the man's power to be in the toe, he would be thought silly, because, while granting that a man penetrates and actuates the whole of his body, he denied his presence in the part. Similarly, no one who admits the presence of the Word of God in the universe as a whole should think it unsuitable for a single human body to be by Him actuated and enlightened.