Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 118. The Eucharist Contains Christ And Is The Food Of The Soul — This they will in some degree accomplish, if, having explained the efficacy and nature of all the Sacraments, they compare the Eucharist to a fountain, the other Sacraments to rivulets. For the Holy Eucharist is truly and necessarily to be called the fountain of all graces, containing, as it does, after an admirable manner, the fountain itself of celestial gifts and graces, and the author of all the Sacrament, Christ our Lord, from whom, as from its source, is derived whatever of goodness and perfection the other Sacraments possess. From this (comparison), therefore, we may easily infer what most ample gifts of divine grace are bestowed on us by this Sacrament.