John 14:11

(vii. de Trin) That the Father dwells in the Son, shows that He is not single, or solitary; that the Father works by the Son, shows that He is not different or alien. As He is not solitary who doth not speak from Himself, so neither is He alien and separable who speaketh by Him. Having shown then that the Father spoke and worked in Him, He formally states this union: Believe Me that I am in the Father, and the Father in Me: that they might not think that the Father worketh and speaketh in the Son as by a mere agent or instrument, not by the unity of nature implied in His Divine birth.

"Believe that I am in the Father and the Father in Me." "Ye ought not, when ye hear of 'Father' and 'Son,' to seek anything else to the establishing of the relationship as to Essence, but if this is not sufficient to prove to you the Condignity and Consubstantiality, ye may learn it even from the works." Had the, "he that hath seen Me, hath seen My Father," been used with respect to works, He would not afterwards have said, "Or else believe Me for the very works' sake." And then to show that He is not only able to do these things, but also other much greater than these, He putteth them with excess. For He saith not, "I can do greater things than these," but, what was much more wonderful, "I can give to others also to do greater things than these."

And then He goes on to say, "Believe ye not that I am in the Father, and the Father in me? Or else believe me for the very works' sake." Formerly it was Philip only who was reproved, but now, it is shown that he was not the only one there that needed reproof. "For the very works' sake," He says, "believe ye that I am in the Father, and the Father in me:" for had we been separated, we should have been unable to do any kind of work inseparably.

(i. de Trin. c. viii) For to that joy of beholding His face, nothing can be added. Philip understood this, and said, Lord, show us the Father, and it sufficeth us. But he did not yet understand that he could in the same way have said, Lord, show us Thyself, and it sufficeth us. But our Lord's answer enlightens him, Jesus saith unto him, Have I been so long with you, and yet hast thou not known Me, Philip? (Tr. lxx. 1) But how is this, when our Lord said that they knew whither He was going, and the way, because they knew Him? The question is easily settled by supposing that some of them knew, and others not; among the latter, Philip. (Tr. lxx) When two persons are very like each, we say, If you have seen the one, you have seen the other. So here, He that hath seen Me, hath seen the Father; not that He is both the Father, and the Son, but that the Son is an absolute likeness of the Father. (Tr. lxx. 3) But is he to be reproved, who, when he has seen the likeness, wishes to see the man of whom he is the likeness? No: our Lord rebuked the question, only with reference to the mind of the asker. Philip asked, as if the Father were better than the Son; and so showed that He did not know the Son. Which opinion our Lord corrects: Believest thou not that I am in the Father, and the Father in Me? as if He said, If it is a great wish with thee to see the Father, at any rate believe what thou dost not see. (i. de. Trin. 8) He wished him to live by faith, before he had sight, and therefore says, Believest thou not? Spiritual vision is the reward of faith, vouchsafed to minds purified by faith. (Tr. lxx. 3. and lxxi. 1) He then addresses all of them, not Philip only: The word that I speak unto you, I speak not of Myself. What is, I speak not of Myself, but, I that speak am not of Myself? He attributes what He does to Him, from whom He Himself, the doer, is. (Tr. lxx. 1, 2) For he that edifieth his neighbour by speaking, doth a good work. These two sentences are brought against us by different sects of heretics; the Arians saying that the Son is unequal to the Father, because He does not speak of Himself; the Sabellians, that the same who is the Father is the Son. For what is meant, they ask, by, The Father that dwelleth in Me, He doeth the works, but, I that dwell in Myself, do these works. (Tr. lxxi. 2) Philip alone was reproved before. (Tr. lxxi. 2) Believe then for My works' sake, that I am in the Father, and the Father in Me; for, were we separated, we could not be working together.

But the disciples, still thinking that the Father is something greater than the Son, seeing only the flesh, and not understanding His divinity, said to Him, "Lord, show us the Father and it sufficeth us." As much as to say, "We know Thee already, and bless Thee that we know Thee: for we thank Thee that Thou hast shown Thyself to us. But as yet we know not the Father: therefore our heart is inflamed, and occupied with a certain holy longing of seeing Thy Father who sent Thee. Show us Him, and we shall desire nothing more of Thee: for it sufficeth us when He has been shown, than whom none can be greater." A good longing, a good desire; but small intelligence. Now the Lord Jesus Himself, regarding them as small men seeking great things, and Himself great among the small, and yet small among the small, says to Philip, one of the disciples, who had said this: "Am I so long time with you, and ye have not known me, Philip?" Here Philip might have answered, Thee we have known, but did we say to Thee, Show us Thyself? We have known Thee, but it is the Father we seek to know. He immediately adds, "He that hath seen me, hath seen the Father also." If, then, One equal with the Father has been sent, let us not estimate Him from the weakness of the flesh, but think of the majesty clothed in flesh, but not weighed down by the flesh. For, remaining God with the Father, He was made man among men, that, through Him who was made man, thou mightest become such as to receive God. For man could not receive God. Man could see man; God he could not apprehend. Why could he not apprehend God? Because he had not the eye of the heart, by which to apprehend Him. There was something within disordered, something without sound: man had the eyes of the body sound, but the eyes of the heart sick. He was made man to the eye of the body; so that, believing on Him who could be seen in bodily form, thou mightst be healed for seeing Him whom thou wast not able to see spiritually. "Am I so long time with you, and ye know me not, Philip? He that hath seen me, hath seen the Father also." Why did they not see Him? Lo, they did see Him, and yet saw not the Father: they saw the flesh, but the majesty was concealed. What the disciples who loved Him saw, saw also the Jews who crucified Him. Inwardly, then, was He all; and in such manner inwardly in the flesh, that He remained with the Father when He came to the flesh.