The apostles in the Gospel ask the Lord for more faith - "Increase our faith!" Jesus gives us the source of all faith in the gift of Himself in the Eucharist. In the Eucharist, the Lord is waiting for us, longing to be with us, because He is truly present there. If we want faith, if we want to know that God is present and acting in our lives, we have to be a people devoted to the Eucharist!
