Catena Aurea

ORIGEN. (non occ.) He wishes to reveal as the Word, not without the exercise of reason; and as Justice, who knoweth rightly both the times for revealing, and the measures of revelation; but He reveals by removing the opposing veil from the heart, (2 Cor. 3:15) and the darkness which He has made His secret place. (Ps. 18:11.) But since upon this men who are of another opinion think to build up their impious doctrine, that in truth the Father of Jesus was sent down to the ancient saints, we must tell them that the words, To whomsoever the Son will reveal him, not only refer to the future time, after our Saviour uttered this, but also to the past time. But if they will not take this word reveal for what is past, they must be told, that it is not the same thing to know and to believe. To one is given by the Spirit the word of knowledge; to another faith by the same Spirit. (1 Cor. 12:8, 9.) There were then those who believed, but did not know.

AMBROSE. But that you may know that as the Son revealed the Father to whom He will, the Father also reveals the Son to whom He will, hear our Lord’s words, Blessed art thou, Simon Barjona, for flesh and blood have not revealed it to thee, but my Father which is in heaven.