Let us see whether the confession of the apostle Thomas agrees with this teaching of the Evangelist, when he says, "My Lord and my God." He is therefore his God whom he acknowledges as God. And certainly he was aware that the Lord had said, "Hear, O Israel, the Lord your God is one." And how did the faith of the apostle become unmindful of the principal commandment, so that he confessed Christ as God, since we are to live in the confession of the one God? The apostle, who perceived the faith of the entire mystery through the power of the resurrection, after he had often heard "I and the Father are one" and "All things that the Father has are mine" and "I in the Father and the Father in me," now confessed the name of the nature without endangering the faith.

For [the word] "son," as one before me has observed, has a twofold meaning: one [is a son] in the order of nature, because he was born a son; the other, in that he was made so, is reputed a son, although there be a difference between being born so and being made so. For the first is indeed born from the person referred to; but the second is made so by him, whether as respects his creation or by the teaching of his doctrine. For when any person has been taught from the mouth of another, he is termed the son of him who instructs him, and the latter [is called] his father. According to nature, then -that is, according to creation, so to speak-we are all sons of God, because we have all been created by God. But with respect to obedience and doctrine we are not all the sons of God: those only are so who believe in Him and do His will. And those who do not believe, and do not obey His will, are sons and angels of the devil, because they do the works of the devil. And that such is the case He has declared in Isaiah: "I have begotten and brought up children, but they have rebelled against Me." And again, where He says that these children are aliens: "Strange children have lied unto Me." According to nature, then, they are [His] children, because they have been so created; but with regard to their works, they are not His children.

Peter, anxious for such desirable life, and preferring his own benefit to that of many, had said, It is good for us to be here. But since charity seeks not her own, Jesus did not this which seemed good to Peter, but descended to the multitude, as it were from the high mount of His divinity, that He might be of use to such as could not ascend because of the weakness of their souls; whence it is said, And when he was come to the multitude; for if He had not gone to the multitude with His elect disciples, there would not have come near to Him the man of whom it is added, There came to him a man kneeling down, and saying, Lord, have mercy on my son. Consider here, that sometimes those that are themselves the sufferers believe and entreat for their own healing, sometimes others for them, as he who kneels before Him praying for his son, and sometimes the Saviour heals of Himself unasked by any. First, let us see what this means that follows, For he is lunatic, and sore vexed. Let the physicians talk as they list, for they think it no unclean spirit, but some bodily disorder, and say, that the humours in the head are governed in their motions by sympathy with the phases of the moon, whose light is of the nature of humours. But we who believe the Gospel say that it is an unclean spirit that works such disorders in men. The spirit observes the moon’s changes, that it may cheat men into the belief that the moon is the cause of their sufferings, and so prove God’s creation to be evil; as other dæmons lay wait for men following the times and courses of the stars, that they may speak wickedness in high places, calling some stars malignant, others benign; whereas no star was made by God that it should produce evil. In this that is added, For ofttimes he falls into the fire, and oft into the water,

Of the changefulness of the sinner it is said, The fool changes as the moon. (Ecclus. 27:12.) We may see sometimes that an impulse towards good works comes over such, when, lo! again as by a sudden seizure of a spirit they are laid hold of by their passions, and fall from that good state in which they were supposed to stand. Perhaps his father stands for the Angel to whom was allotted the care of this lunatic, praying the Physician of souls, that He would set free his son, who could not be delivered from his suffering by the simple word of Christ’s disciples, because as a deaf person he cannot receive their instruction, and therefore he needs Christ’s word, that henceforth he may not act without reason.