Amazed at his understanding and his answers

Luke 2:41-52
The boy Jesus stayed behind in Jerusalem, but their parent were unaware of it. Three later they found Jesus in the the temple courts, sitting among the teachers, listening to them and asking them questions. Everyone who heard him was amazed at his understanding and his answers.
His mother said to him,'Son, why have you treated us like this? Your father and I have been anxiously searching for you."
"Why were you searching for me?" he asked. "Didn't you know I had to be in my Father's house?"
Then he went down to Nazareth with them and was obedient to them. But his mother treasured all these things in her heart.
This one story is all we know of Jeuss' boyhood. It must have stood head and shoulders above all Mary's other memories, as perhaps the first indication of all that would follow.
At 12, a Jewish boy underwent preparation for adult status in the religious community. This visit to Jerusalem is therefore a special one for Jesus. Victors flocked into the city for Passover, travelling in large parties for safety.
Jesus parents have no reason to suspect he is missing till the evening halt. Next day they retrace their steps, and on the following morning find him in the Temple. For Jesus, on a rare visit from distant Nazareth, the opportunity to engage with the best teachers is not to be missed. He forgets all about his parents. 'My Father' has priority. This is the first indication that Jesus realized his special relationship with God. The next 18 years are passed over in total silence.
Why?
There were many relative and people came to Jerusalem for Passover festival so Jesus parent unaware of Jesus did not follow them.
Everyone amazed with what Jesus' understanding and answers. For Jesus is understand the word of God.
Here symbolized that Jesus is son of God. And Mary remembered this in her heart.
How?
Understanding the word of God and answer is our ability to the bible as we can. Which needs Holy Spirit inspire us.