In that hour Jesus rejoiced in spirit, and said,
I thank you, O Father, Lord of heaven and earth, that you have hid these things from the wise and prudent, and have revealed them unto babes: even so, Father; for so it seemed good in your sight.
All Commentaries on Luke 10:21 Go To Luke 10
Cyril of Alexandria
AD 444
He saw in truth that through the operation of the Holy Spirit, which He gave to the holy Apostles, the acquisition of many would be made, (or that many would be brought to the faith.) He is said therefore to have rejoiced in the Holy Spirit, that is, in the results which came forth through the Holy Spirit. For as one who to be mankind He considered the conversion of sinners to be a subject for rejoicing, for which He gives thanks. As it follows, I give thanks to you, O Father.
Now here, say they whose hearts are perverted, the Son gives thanks to the Father as being inferior But what should prevent the Son of the same substance with the Father from praising His own Father, who saves the world by Him? But if you think that because of His giving thanks He shows Himself to be inferior, observe, that He calls Him His Father, and the Lord of heaven and earth.
Now having said that all things were given Him by His Father, He rises to His own glory and excellence showing that in nothing He is surpassed by His Father. Hence He adds, And no one knows who the Son is but the Father, For the mind of the creatures is not able to comprehend the manner of the Divine substance, which passes all understanding, and His glory transcends our highest contemplations. By Itself only is known what the Divine nature is. Therefore the Father, by that which He is, knows the Son the Son, by that which He is, knows the Father, no difference intervening as regards the Divine nature. And in another place. For that God is, we believe, but what he is by nature, is incomprehensible. But if the Son was created, how could He alone know the Father, or how could He be known only by the Father. For to know the Divine nature is impossible to any creature, but to know each created thing what it is, does not surpass every understanding, though it is far beyond our senses.