ANSWER: Jesus had a normal bodily and mental growth. He learned from his mother and Joseph to speak Aramaic, his mother tongue. The rabbi taught him to read Hebrew, then a dead language. His knowledge of the Holy Scriptures came from hearing them read every sabbath in the synagogue. Dr. Stalker suggests that through the kindness of the sacristan, or sexton, this model boy whom everybody admired had access on week days to the sacred scrolls kept in the synagogue and that he diligently studied them. But at twelve his knowledge that God, not Joseph, was his Father, was a supernatural, spiritual intuition. Such intuitions continued to unfold as long as he lived on the earth.
— Steele's Answers pp. 24, 25.