"Faith in the Eucharist is not an easy faith. One cannot use the criterion of knowledge through contact or the experience of the Presence. It is pure faith. This is why I said that the Eucharist is "the testing ground of faith," of our faith. If there is no faith in the Eucharist it is because an approach is lacking to the mystery of the faith."
January 1, 1970
https://en.wikiquote.org/wiki/Jozef_Tomko