Luke 2:52 (NKJV)
And Jesus increased in wisdom and stature, and in favor with God and men.
The bible says very little about Jesus' childhood except for the time when He was twelve and was discovered missing by his parents and found in the temple "about His Father's business." We don't see him again until he was thirty years old and began His public ministry which lasted three years. What went on in the meantime? The only clue we have is this verse above. Jesus was a perfect man. He was fully God and yet fully man too. He is the God-man. This verse tells us he grew mentally (wisdom), physically (stature), spiritually (favor with God), and socially (favor with men).
The bible says that He was a man of sorrows and acquainted with grief. What a wonderful truth this is. By becoming a man, God is able to fully relate to us. More importantly, He is able to become our kinsman redeemer.
Hebrews 4:15 (NKJV)
For we do not have a High Priest who cannot sympathize with our weaknesses, but was in all points tempted as we are, yet without sin.