We must remember that faith is the greatest gift that God has offered man on this earth, because from an earthly man he becomes a citizen of Heaven. Let us guard this gift jealously. Woe to him who forgets himself, who forgets Heaven, whose faith grows weak, and worse still (may God preserve us all) who denies his faith. This is the greatest affront that man can offer to God.
-- Saint Padre Pio of Pietrelcina