Bede

And when he was twelve years old, as they went up to Jerusalem according to the custom of the feast day, and having completed the days as they returned, the boy Jesus remained in Jerusalem. The one who, from birth, indeed from human conception, was approved by clear signs of miracles showing that he is God, even then, as soon as the time of age was appropriate, began reverently to reveal and open both his natures, namely, what in truth of divine majesty belonged to the Father, and what, according to the frailty of human assumption, belonged to the mother. Nor without foresight did he reveal the first rudiments of his faith at twelve years old, which by the ministry of the twelve apostles was to be revealed and elucidated throughout the world. We can also say this, that as with the number seven, similarly the number twelve, which consists of the multiplied parts of seven, may designate the totality and perfection of things or times. And for this reason, that it is fitting for all places or times to be occupied, the light rightly takes its beginning from the number twelve. Therefore, it is not idly said that he appeared to have been unmindful of his parents, but that he instructs us, because not only before his own parents, but even before Abraham was made, he is, he delights rather to reside in the city and temple of God, as if by paternal right.

We may also say, that as by the seventh number, so also by the twelfth, (which consists of the parts of seven multiplied alternately by one another,) the universality and perfection of either things or times is signified, and therefore rightly from the number twelve, the glory of Christ takes its beginning, being that by which all places and times are to be filled.

(in Hom. post Epiph.) Now that the Lord came up every year to Jerusalem at the Passover, betokens His humility as a man, for it is man's duty to meet together to offer sacrifices to God, and conciliate Him with prayers. Accordingly the Lord as man, did among men what God by angels commanded men to do. Hence it is said, According to the custom of the feast day. (Gal. 3:14, Judges 6:20; 13:16.) Let us follow then the journey of His mortal life, if we delight to behold the glory of His divine nature.

But some one will ask, how was it that the Son of God, brought up by His parents with such care, could be left behind from forgetfulness? To which it is answered, that the custom of the children of Israel while assembling at Jerusalem on the feast days, or returning to their homes, was for the women and men to go separately, and the infants or children to go with either parent indiscriminately. And so both Mary and Joseph each thought in turn that the Child Jesus, whom they saw not with them, was returning with the other parent. Hence it follows, But they, supposing him to have been in the company, &c.

To show that He was a man, He humbly listened to the masters; but to prove that He was God, He divinely answered those who spake.

For from His tongue there went forth divine wisdom, while His age exhibited man's helplessness, and hence the Jews, amid the high things they hear and the lowly things they see, are perplexed with doubts and astonishment. But we can in no wise wonder, knowing the words of the Prophet, that thus unto us a Child is born, that He abideth the mighty God. (Is. 9:6.)

He blames them not that they seek Him as their son, but compels them to raise the eyes of their mind to what was rather due to Him whose eternal Son He was. Hence it follows, Knew ye not? &c.

It follows, And they understood him not, that is, the word which He spoke to them of His divinity.

And all who heard him were astonished at his wisdom and answers, and seeing him, they were amazed. Note the distinction of words, and diligently examine the mysteries of your salvation and faith. They were astonished at what they heard from him, and seeing him, they were amazed. And they were all the more astonished at the wisdom of his answers, the more they despised the fewness of his years seeing it. His tongue revealed divine wisdom, but his age pretended human infirmity. Truly, let these things astound the doctors of the Jews as if they were new, and let them be disturbed by a doubtful amazement among the high things they hear and the weak things they see. But let us, knowing that this is he of whom the Prophet once rejoiced, saying, "A child is born to us, a son is given to us, and his name shall be called Wonderful, Counselor, Mighty God" (Isaiah 9); let us in no way wonder at him, who has been made a little child and yet has always remained what he was, namely, God and mighty, displaying at times signs of his divinity, at times signs of his humanity to those he wished to instruct. But let us give thanks to him with faith, hope, and charity, because he who was great and exceedingly praiseworthy, though we did not know him, was born as a little child for us, so that by growing and advancing among the little ones, he might gradually lead them to embrace the secrets of his virtue and greatness.

And they did not understand the word that he spoke to them. And he went down with them, and came to Nazareth, and was subject to them. How much an example of piety and humility in the Lord! His parents did not understand the word that he spoke to them about his divinity, and yet he, not ungrateful for their human diligence towards him, descended to where they commanded, and was subject to them. For what would the teacher of virtue be if he did not fulfill the duty of piety? What else among us than that he would do what he wanted us to do? He deferred to a man, he deferred to a maidservant. For she herself says: Behold the handmaid of the Lord (Luke 1). He deferred to the simulated father, he deferred to the true father who is God. And indeed he had preserved his mother, born of a virgin, as a virgin and chaste; indeed, he did not differ from the father by will, by act, or by time. In order that, being admonished by his example, we might recognize what we owe to our parents, who suffer so much for us. The Arians are wont to say that the Son was imperfect because he said, The Father is greater than I (John 14). But what marvel if from human reception he asserts himself lesser than the Father in heaven, from which he was also subject to his parents on earth?

Pilate was sent in the twelfth year of Tiberius to take the government of the Jewish nation, and remained there for ten successive years, almost until the death of Tiberius. But Herod, and Philip, and Lysanias, were the sons of that Herod in whose reign our Lord was born. Between these and Herod himself Archelaus their brother reigned ten years. He was accused by the Jews before Augustus, and perished in exile at Vienne. But in order to reduce the Jewish kingdom to greater weakness, August us divided it into Tetrarchies.

Both Annas and Caiaphas, when John began his preaching, were the High Priests, but Annas held the office that year, Caiaphas the same year in which our Lord suffered on the cross. Three others had held the office in the intervening time, but these two, as having particular reference to our Lord's Passion, are mentioned by the Evangelist. For at that time of violence and intrigue, the commands of the Law being no longer in force, the honour of the High Priest's office was never given to merit or high birth, but the whole affairs of the Priesthood were managed by the Roman power. For Josephus relates, that Valerius Gratus, when Annas was thrust out of the Priesthood, appointed Ismael High Priest, the son of Baphas; but not long after casting him off, he put in his place Eleazar the son of the High Priest Ananias. After the space of one year, he expelled him also from the office, and delivered the government of the High Priesthood to a certain Simon, son of Caiaphas, who holding it not longer than a year, had Joseph, whose name also was Caiaphas, for his successor; so that the whole time during which our Lord is related to have taught is included in the space of four years.

During the high priesthood of Annas and Caiaphas, the word of the Lord came to John, the son of Zechariah, in the desert. Both indeed, at the beginning of John's prophecy, that is, Annas and Caiaphas were the chief priests; but Annas held the office for that year, while Caiaphas administered it in the year when the Lord ascended the cross, and indeed with three others in between completing the pontificate, but especially with those mentioned by the evangelist who were related to the passion of the Lord. For at that time, legal precepts having ceased through force and ambition, the honor of the pontificate was conferred neither on account of life nor lineage, but by Roman authority it was conferred upon some now, and again upon others. Indeed, Josephus reports in this manner, saying: Valerius Gratus, having removed Annas from the priesthood, appointed Ismael, son of Fabo, as high priest. But soon after rejecting him as well, he substituted Eleazar, son of Ananus, to the high priesthood. After one year, he also removed him from office and bestowed the ministry of the high priesthood upon one Simon, son of Camith. He too fulfilled the office scarcely for the breadth of a year and then received Joseph, whose name was also Caiaphas, as a successor. And thus, the whole time in which our Lord is described as teaching on earth is confined within a span of four years. In this time, the four successions of high priests that Josephus mentions are described, scarcely ministering for individual years. Because John was coming to preach about Him who would redeem some from Judea and many from the Gentiles, the times of his preaching are designated by the king of the nations and the princes of the Jews. Because the Gentiles were to be gathered, and Judea, for its fault of unfaithfulness, was to be scattered, the very account of earthly authority also shows that in the Roman republic one is described as presiding, and in the kingdom of Judea, many ruled by quarters. For our Redeemer's voice says: “Every kingdom divided against itself will be desolate” (Matthew XII). Therefore, it is clear that the kingdom of Judea had come to an end since it was subjected to division under so many kings. It is fittingly demonstrated not only by which kings, but also by which priests the events took place. So that because John the Baptist was to preach about Him who would also be king and priest at the same time, Luke the evangelist designated the times of his preaching by the kingdom and the priesthood.