Luke 2:40

(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.

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.

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.

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.