When our Savior says to the Jews: “Your fathers did eat manna and died, ... but he that eateth this (Eucharistic) bread shall live forever,” He evidently wishes to affirm the superiority of the food which He would give, over the manna by which the children of Israel were nourished.
Now, if the Eucharist were merely commemorative bread and wine, instead of being superior, it would be really inferior to the manna; for the manna was supernatural, heavenly, miraculous food, while bread and wine are a natural, earthly food. - Cardinal Gibbons