|Archbishop Fulton J. Sheen|
During the Tre Ore sermon which he preached on Good Friday some years ago, Fulton J. Sheen asked his audience:
"If Jesus Christ thirsted for souls, must not a Christian also thirst? If He came to cast fire on the earth, must not a Christian be enkindled? Has he not called us to be His apostles and His ambassadors, in order that His Incarnation might be prolonged through the continued dispensation of the divine through the human?"
He answered his own question by declaring that, "A Catholic who does not strive to spread his Faith is a parasite on the life of the Church."
Link (here) to the full essay by Fr. John Hardon, S.J. entitled Archbishop Fulton J. Sheen - Author, Orator and Missionary.