For to that joy of beholding His face, nothing can be added. Philip understood this, and said, Lord, shew us the Father, and it sufficeth us. But he did not yet understand that he could in the same way have said, Lord, shew 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?
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: i. de Trin. c. viii