Born into the tribe of Ephraim in Egypt. He knew the lash of the taskmaster. He was a young man during the plagues and the Red Sea crossing. He tasted slavery, which made him hunger for liberty.
He was Moses' "aide" or assistant from his youth. He did the menial tasks—carrying the staff, guarding the tent. He was formed by serving greatness.
He was formed by Presence. Exodus 33:11 says, "When Moses returned to the camp, his young aide Joshua son of Nun did not leave the tent." He lingered in God's presence even when he wasn't "on duty."