Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 135. Of this the Ark of the Lord affords a convincing illustration. The people of Israel possessed nothing more precious and it was to them the source of innumerable blessings from God; but when the Philistines carried it away, it brought on them a most destructive plague and the heaviest calamities, together with eternal disgrace. Thus also food when received from the mouth into a healthy stomach nourishes and supports the body; but when received into an indisposed stomach, causes grave disorders.