40 And the child grew, and waxed strong in spirit, filled with wisdom: and the grace of God was upon him.
[AD 253] Origen of Alexandria on Luke 2:39-40
In the Gospel of Luke, the Holy Spirit writes this of him before he reached the age of twelve: “But the boy grew and was strengthened, and he was filled with wisdom.” Human nature itself does not permit this, that wisdom is perfected before the twelfth year of life. It is one thing to participate in wisdom, another thing to be filled with wisdom.…The Son of God “had emptied himself,” and, for that reason, again he is filled with wisdom. “And the grace of God was upon him.” He possessed the grace of God not when he reached young manhood, not when he taught openly, but already when he was a small child.

[AD 373] Athanasius of Alexandria on Luke 2:39-41
(lib. de Incarn. Christi cont. Apollin.) But if as some say the flesh was changed into a Divine nature, how did it derive growth? for to attribute growth to an uncreated substance is impious.

[AD 407] John Chrysostom on Luke 2:39-41
(Orat. cont. Judæos.) At the feast of the Hebrews the law commanded men not only to observe the time, but the place, and so the Lord's parents wished to celebrate the feast of the Passover only at Jerusalem.

[AD 430] Augustine of Hippo on Luke 2:39-41
(de Con. Evan. ii. 9.) Perhaps it may strike you as strange that Matthew should say that His parents went with the young Child into Galilee because they were unwilling to go to Judæa for fear of Archelaus, when they seem to have gone into Galilee rather because their city was Nazareth in Galilee, as Luke in this place explains it. But we must consider, that when the Angel, said in a dream to Joseph in Egypt, Rise, and take the young child and his mother, and go into the land of Israel, (Matt. 2:20.) it was at first understood by Joseph as a command to go into Judæa, for so at first sight the land of Israel might have been taken to mean. But when afterwards he finds that Herod's son Archelaus was king, he was unwilling to be exposed to that danger, seeing the land of Israel might also be understood to include Galilee also as a part of it, for there also the people of Israel dwelt.

(de Con. Ev. ii. 10.) But it may be asked, how did His parents go up all the years of Christ's childhood to Jerusalem, if they were prevented from going there by fear of Archelaus? This question might be easily answered, even had some one of the Evangelists mentioned how long Archelaus reigned. For it were possible that on the feast day amid so great a crowd they might secretly come, and soon return again, at the same time that they feared to remain there on other days, so as neither to be wanting in religious duties by neglecting the feast, nor leave themselves open to detection by a constant abode there. But now since all have been silent as to the length of Archelaus' reign, it is plain that when Luke says, They were accustomed to go up every year to Jerusalem, we are to understand that to have been when Archelaus was no longer feared.

[AD 444] Cyril of Alexandria on Luke 2:39-40
Do not think to yourself, “How can God grow?” “How can he who gives grace to angels and to men receive fresh wisdom?” Rather reflect upon the great skill with which we are initiated into his mystery. For the wise Evangelist did not introduce the Word in his abstract and incorporeal nature. He says of him that “he increased in stature and wisdom and grace,” but after having shown that he was born in the flesh of a woman and took our likeness, he then assigns to him these human attributes. Only then does he call him a child and say that he grew in stature, as his body grew little by little, in obedience to corporeal laws. So he is said also to have increased in wisdom, not as receiving fresh supplies of wisdom. God is perceived by the understanding to be entirely perfect in all things and altogether incapable of being destitute of any attribute suitable to the Godhead. So God the Word gradually manifested his wisdom proportionally to the age which the body had attained.The body then advances in stature, and the soul, in wisdom. The divine nature is capable of increase in neither one nor the other, seeing that the Word of God is all perfect. With good reason be connected the increase of wisdom with the growth of the bodily stature, because the divine nature revealed its own wisdom in proportion to the measure of the bodily growth.

[AD 444] Cyril of Alexandria on Luke 2:39-41
Rightly with the growth in age, St. Luke has united increase in wisdom, as he says, And he was strengthened, (i. e. in spirit.) For in proportion to the measure of bodily growth, the Divine nature developed its own wisdom.

[AD 735] Bede on Luke 2:39-41
Luke has omitted in this place what he knew to have been sufficiently set forth by Matthew, that the Lord after this, for fear that He should be discovered and put to death by Herod, was carried by His parents into Egypt, and at Herod's death, having at length returned to Galilee, came to dwell in His own city Nazareth. For the Evangelists individually are wont to omit certain things which they either know to have been, or in the Spirit foresee will be, related by others, so that in the connected chain of their narrative, they seem as it were to have omitted nothing, whereas by examining the writings of another Evangelist, the careful reader may discover the places where the omissions have been. Thus after omitting many things, Luke says, And when they had accomplished all things, &c.

We must observe the distinction of words, that the Lord Jesus Christ in that He was a child, that is, had put on the condition of human weakness, was daily growing and being strengthened.

Wisdom truly, for in Him dwelleth all the fulness of the Godhead bodily, (Col. 2:19.) but grace, because it was in great grace given to the man Christ Jesus, that from the time He began to be man He should be perfect man and perfect God. But much rather because He was the word of God, and God needed not to be strengthened, nor was in a state of growth. But while He was yet a little child He had the grace of God, that as in Him all things were wonderful, His childhood also might be wonderful, so as to be filled with the wisdom of God. It follows, And his parents went every year to Jerusalem, at the feast of the Passover.

[AD 1107] Theophylact of Ohrid on Luke 2:39-41
Bethlehem was indeed their city, their paternal city, Nazareth the place of their abode.

Now our Lord might have come forth from the womb in the stature of mature age, but this would seem like something imaginary; therefore His growth is gradual, as it follows, And the child grew, and waxed strong.

For if while yet a little child, He had displayed His wisdom, He would have seemed a miracle, but together with the advance of age He gradually showed Himself, so as to fill the whole world. For not as receiving wisdom is He said to be strengthened in spirit. For that which is most perfect in the beginning, how can that become any more perfect. Hence it follows, Filled with wisdom, and the grace of God was in him.

[AD 1274] Ancient Greek Expositor on Luke 2:39-41
(Metaphrastes.) Or again, Luke is here describing the time before the descent to Egypt, for before her purification Joseph had not taken Mary there. But before they went down into Egypt, they were not told by God to go to Nazareth, but as living more freely in their own country, thither of their own accord they went; for since the going up to Bethlehem was for no other reason but the taxing, when that was accomplished they go down to Nazareth.

[AD 444] Cyril of Alexandria on Luke 2:40
TO say that the child grew, and waxed strong in spirit, being filled with wisdom, and the grace of God was upon Him, must be taken as referring to His human nature. And examine, I pray you, closely the profoundness of the dispensation: the Word endures to be born in human fashion, although in His divine nature He has no beginning nor is subject to time: He Who as God is all perfect, submits to bodily growth: the Incorporeal has limbs that advance to the ripeness of manhood: He is filled with wisdom Who is Himself all wisdom. And what say we to this? Behold by these things Him Who was in the form of the Father made like unto us: the Rich in poverty: the High in humiliation: Him said to "receive," Whose is the fulness as God. So thoroughly did God the Word empty Himself! For what things are written of Him as a man show the manner of the emptying. For it were a thing impossible for the Word begotten of God the Father to admit ought like this into His own nature: but when He became flesh, even a man like unto us, then He is born according to the flesh of a woman, and is said also to have been subject to the things that belong to man's state: and though the Word as being God could have made His flesh spring forth at once from the womb unto the measure of the perfect man, yet this would have been of the nature of a portent: and therefore He gave the habits and laws of human nature power even over His own flesh.
Be not therefore offended, considering perchance within thyself, How can God increase? or how can He Who gives grace to angels and to men receive fresh wisdom? Rather reflect upon the great skill wherewith we are initiated into His mystery. For the wise Evangelist did not introduce the Word in His abstract and incorporeal nature, and so say of Him that He increased in stature and wisdom and grace, but after having shown that He was born in the flesh of a woman, and took our likeness, he then assigns to Him these human attributes, and calls Him a child, and says that He waxed in stature, as His body grow little by little, in obedience to corporeal laws. And so He is said also to have increased in wisdom, not as receiving fresh supplies of wisdom,----for God is perceived by the understanding to be entirely perfect in all things, and altogether incapable of being destitute of any attribute suitable to the Godhead:----but because God the Word gradually manifested His wisdom proportionably to the age which the body had attained.
The body then advances in stature, and the soul in wisdom: for the divine nature is capable of increase in neither one nor the other; seeing that the Word of God is all perfect. And with good reason he connected the increase of wisdom with the growth of the bodily stature, because the divine nature revealed its own wisdom in proportion to the measure of the bodily growth.
[AD 735] Bede on Luke 2:40
And the child grew and became strong, filled with wisdom, and the grace of God was upon him. The distinction of the words is notable, because the Lord Jesus Christ, in that he was a child, that is, had assumed the condition of human frailty, had to grow and become strong. But in that he was also the Word of God and the eternal God, he did not need to become strong nor did he need to grow. Hence, he is very rightly said to be full of wisdom and grace. Wisdom because in him dwells all the fullness of deity bodily. Grace because to the same mediator between God and men, the man Jesus Christ, great grace was given, so that from the moment he began to be man, he might be perfect and God. Similar to this is what John writes, that he is full of grace and truth, he himself setting forth that same excellence of divinity of truth, which Luke commends under the name of wisdom.