Jesus Christ is the great central figure of the Gospel. It was Christ who was with Israel in all their journey from Egypt to the promised land.
Christ was the "Spiritual Rock" which followed them. He was in the pillar of cloud by day, and in the pillar of fire by night. He was the "Angel" that went before Israel; for Jehovah said, "My name is in Him." (See Exodus 23:21, 22.) No being bears the name of God but His Son.
So, in the history of the world, it has not been as some have supposed, God the Father in the Old Testament, and Christ the Son in the New Testament. It has been Christ with His people all the way.
In the Old Testament Christ was their "Spiritual Rock." In the New Testament, "God was in Christ, reconciling the world unto Himself." 2 Corinthians 5:19.
Both the Father and the Son have ever worked for the salvation of man; but Christ has been the active agent in this work. It was God who "so loved the world that He gave His only begotten Son" for our redemption. It was Christ who made the terrible sacrifice for our salvation.
The Israelites Crossing the Jordan.