"And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross." (Philippians 2:8)
The only begotten Son of God substituted Himself for all humanity to save them from the righteous judgment of a thrice-holy Creator.
Jesus found Himself "in fashion as a man," which therefore made it possible for Him to humble Himself and to become obedient to the death that had been ordained for Him prior to the very foundation of the world (1 Peter 1:20).
Perhaps it is too much to suggest that Jesus "woke up" when He "found" Himself in Mary's womb, but it is certain that He "increased in wisdom" (Luke 2:52) as He grew in "stature." Basically, because He "became" human, He experienced the normal increase in awareness and experience that all of us do.
The difference was, obviously, that He "humbled" Himself, even though He "was in all points tempted like as we are, yet without sin" (Hebrews 4:15). Christ's sinless behavior could have easily "exalted" Him as His wisdom and miracles became known throughout Israel. Indeed, many tried to make Him King.
Isaiah prophetically records the mindset of the Lord many years before He actually entered Jerusalem: "I set my face like a flint" (Isaiah 50:7). Later, Jesus told His disciples, "I have a baptism to be baptized with; and how am I straitened till it be accomplished!" (Luke 12:50).
Finally, the obedience of our Lord Jesus, understood fully and deeply at Gethsemane, was fully accomplished, "even the death of the cross." May our hearts never forget or tire of these great truths. HMM III