What is the meaning of Luke 2:39-40?

BURKITT : | Lu 2:1-7 | Lu 2:8-12 | Lu 2:13-14 | Lu 2:15-20 | Lu 2:21 | Lu 2:22-24 | Lu 2:25-28 | Lu 2:29-33 | | Lu 2:34-35 | Lu 2:36-38 | Lu 2:39-40 | Lu 2:41-42 | Lu 2:43-45 | Lu 2:46-47 | Lu 2:48 | Lu 2:49 | Lu 2:50-52 | KJV

Reference

39 And when they had performed all things according to the law of the Lord, they returned into Galilee, to their own city Nazareth. 40 And the child grew, and waxed strong in spirit, filled with wisdom: and the grace of God was upon him. (Luke 2:39-40 KJV)

William Burkitt’s Commentary

Here we see the truth and reality of Christ’s human nature: he grew as we do, from infancy to childhood, from childhood to youth and manhood. To his divine nature, no accession or addition could be made, for that which is infinite cannot increase. The Deity was infinite in Christ, so was not the humanity, but capable of additions: and accordingly as Christ grew up in the stature of his body, the faculties of his mind increased, through the grace and power of God’s Spirit upon him.