Following Jewish custom, Mary and Joseph took the twelve-year-old Jesus to the Feast of the Passover in Jerusalem. When they started home, they assumed Jesus was with their relatives—but Jesus had actually stayed behind in His Father’s house. As Alistair Begg explains, Jesus’ understanding of the Old Testament and of His own messiahship governed His decision. This glimpse into Jesus’ boyhood underscores His full divinity and humanity as the Son of God and Son of Man who came to bear our sins.