St. Paul gives us a context for this. In the genius of the traditional Missal, this Gospel is paired with this Epistle, in which St. Paul addresses the Corinthians about their destiny in their newfound faith. Our purpose in this life is to get to heaven. And this is how we await the coming of our Lord at the end of time, this is how we persevere, by the practice of the sacraments.
In this one brief Gospel passage, we have the whole Paschal Mystery. Our Lord has entered into a boat. The boat is always a sign of the Church. By His birth and incarnation, He has descended into humanity and established the Church. He passes over the water. The sea is a sign of all the mysteries of life, those things which we do not understand. He passes over them. This is not just a term which says He went from here to there. He encounters all the mysteries of life and overcomes them. We see this when He calms the sea. And He enters into the city, a sign for the world.
He heals the paralytic, who rises, takes up His mat, and goes home. This is resurrection language. Our Lord rises from the dead, and ascends into heaven to prepare our heavenly home.
It is by the Lord’s Paschal Mystery that He gives us this life, and it is through our faith and the sacraments that we receive it. Today, we celebrate this Mass, the Sacrifice of our Lord, the sacrament of the cross and resurrection, and of His real presence, just as St. Paul says, the grace of God given us in Christ, that in all things we are made rich in Him, the testimony of Christ confirmed in us.