Augustine of Hippo
Catena Aurea · Johannesevangelium 14
Philip saith unto him, Lord, shew us the Father, and it sufficeth us. Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father? Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works. Believe me that I am in the Father, and the Father in me: or else believe me for the very works’ sake.
(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.