Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 122. The reason, then, for saying that this Sacrament imparts grace, is that even the first grace, with which all should be clothed before they presume to approach the Holy Eucharist, lest they eat and drink judgment to themselves,' is given to none unless they receive in wish and desire this very Sacrament. For the Eucharist is the end of all the Sacraments, and the symbol of unity and brotherhood in the Church, outside which none can attain grace.