13. That genuine charity, therefore, which knows how to do and to suffer all things for the salvation and the benefit of all, leaps forth with all the heat and energy of a flame from that most holy Eucharist in which Christ Himself is present and lives, in which He indulges to the utmost. His love towards us, and under the impulse of that divine love ceaselessly renews His Sacrifice. And thus it is not difficult to see whence the arduous labours of apostolic men, and whence those innumerable designs of every kind for the welfare of the human race which have been set on foot among Catholics, derive their origin, their strength, their permanence, their success.