Luke 2:51-52

Then after the discussion with the doctors of the law in the Temple:

Just like you and me, He had to grow. God did not open up Jesus' head and pour in all this knowledge, wisdom, and power like a funnel. He had to go through all the exercise of discipline it takes to thoroughly understand something and accumulate knowledge; meditate on things and come to understand them.

Incidentally, I might add something here that all these things are given that we can understand that when Jesus finished His course, He was prepared to be our Mediator and High Priest. He saw life from the same perspective, from the same worldview as we do. He grew up in a middle class family, a family that did not have a lot of money, in a small town. He grew in wisdom. He accumulated knowledge and understanding just as we do.