Hilary of Poitiers
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.
(vii. de Trin) He does not mean the sight of the bodily eye: for His fleshly part, born of the Virgin, doth not avail towards contemplating the form and image of God in Him; but the Son of God being known with the understanding, it follows that the Father is known also, forasmuch as He is the image of God, not differing from but expressing His Author1. For our Lord’s expressions do not speak of one person solitary and without relationship, but teach us His birth. The Father also excludes the supposition of a single solitary person, and leaves us no other doctrine but that the Father is seen in the Son, by the incommunicable likeness of birth.