The People of Israel are in Egypt, slaves of Pharaoh. Moses leads them out of Egypt through the waters of the Red Sea, where Pharaoh and his soldiers are drowned, into the desert with the promise of one day reaching the Holy Land. They wander in the desert for 40 years, guided by the Pillar of Fire and the Commandments, and sustained by Manna from heaven. Some longed to return to Egypt, preferring the relative comfort of Egyptian slavery to the hardships of freedom in the desert. The prophet Jesus (Joshua) finally leads those who have remained faithful into the Promised Land.
We are in the world, slaves to the Devil. We are led out of this slavery through the waters of baptism, where the Devil and his demons lose their power over us. We thereby enter the battleground of faith, the Church militant, guided by the Spirit of God and Holy Tradition, and receiving divine sustenance from the Eucharist. Some return to the ways of the world, preferring the comfort of sin to the hardship of the Cross. At the end of one’s earthly life, those who have remained faithful attain the Heavenly Jerusalem, the presence of Jesus.