When Jesus had returned with his parents to Nazareth, after being lost and found in the Temple (cf. Lk 2:41-51). There we read that “he was obedient to them” (cf. Lk 2:51); he did not disown his family. Luke then adds that Jesus “grew in wisdom, age and grace before God and men” (cf. Lk 2:52). In a word, this was a time of preparation, when Jesus grew in his relationship with the Father and with others. Saint John Paul II explained that he did not only grow physically, but that “there was also a spiritual growth in Jesus”, because “the fullness of grace in Jesus was in proportion to his age: there was always a fullness, but a fullness which increased as he grew in age”.
From what the Gospel tells us, we can say that Jesus, in the years of his youth, was “training”, being prepared to carry out the Father’s plan. His adolescence and his youth set him on the path to that sublime mission.
In his adolescence and youth, Jesus’ relationship with the Father was that of the beloved Son. Drawn to the Father, he grew up concerned for his affairs: “Did you not know that I must be about my Father’s business?” (Lk 2:49). Still, it must not be thought that Jesus was a withdrawn adolescent or a self-absorbed youth. His relationships were those of a young person who shared fully in the life of his family and his people. He learned his father’s trade and then replaced him as a carpenter. At one point in the Gospel he is called “the carpenter’s son” (Mt 13:55) and another time simply “the carpenter” (Mk 6:3). This detail shows that he was just another young person of his town, who related normally to others. No one regarded him as unusual or set apart from others. For this very reason, once Jesus began to preach, people could not imagine where he got this wisdom: “Is this not Joseph’s son?” (Lk 4:22).
Christus Vivit, 26-28.