It will help if we understand that the Christian life can be divided into two stages- the Red Sea stage and the Jordan River stage, with the wilderness in between. What the cross is to us, the Red Sea was to Israel. It was the symbol of their redemption, their deliverance from the bondage of Egypt by the mighty hand of God. They looked back at the Red Sea as we look back at the cross; they celebrated the Passover as we celebrate the Lord’s Supper.
But it wasn’t enough to get them out of Egypt, Moses reminded the people in Deuteronomy 6:23,” and He brought us out from the [Egypt] in order to bring us in, to give us the land which He had sworn to our fathers.”
He brought us out to bring us in.