Hilary of Poitiers

(vii. de Trin) A declaration so new startled Philip. Our Lord is seen to be man. He confesses Himself to be the Son of God, declares that, if He were known, the Father would be known, that, if He is seen, the Father is seen. The familiarity of the Apostle therefore breaks forth into questioning our Lord, Philip saith unto Him, Lord, shew us the Father, and it sufficeth us.He did not deny He could be seen (non visum negavit), but wished to be shewn him; nor did he wish to see with his bodily eyes, but that He whom he had seen might be made manifest to his understanding. He had seen the Son in the form of man, but how through that form He saw the Father, he did not know. This he wants to be shewn him, shewn to his understanding, not set before his eyes; and then he will be satisfied: And it sufficeth us.