11 Furthermore, if anyone will diligently examine into the causes of the evils of our day, he will find that they arise from this, that as charity towards God has grown cold, the mutual charity of men among themselves has likewise cooled. Men have forgotten that they are children of God and brethren in Jesus Christ; they care for nothing except their own individual interests; the interests and the rights of others they not only make light of, but often attack and invade. Hence frequent disturbances and strifes between class and class: arrogance, oppression, fraud on the part of the more powerful: misery, envy, and turbulence among the poor. These are evils for which it is in vain to seek a remedy in legislation, in threats of penalties to be incurred, or in any other device of merely human prudence. Our chief care and endeavour ought to be, according to the admonitions which We have more than once given at considerable length, to secure the union of classes in a mutual interchange of dutiful services, a union which, having its origin in God, shall issue in deeds that reflect the true spirit of Jesus Christ and a genuine charity. This charity Christ brought into the world, with it He would have all hearts on fire. For it alone is capable of affording to soul and body alike, even in this life, a foretaste of blessedness; since it restrains man's inordinate self-love, and puts a check on avarice, which "is the root of all evil" (1 Tim. vi., 10). And whereas it is right to uphold all the claims of justice as between the various classes of society, nevertheless it is only with the efficacious aid of charity, which tempers justice, that the "equality" which St. Paul commended (2 Cor. viii., 14), and which is so salutary for human society, can be established and maintained. This then is what Christ intended when he instituted this Venerable Sacrament, namely, by awakening charity towards God to promote mutual charity among men. For the latter, as is plain, is by its very nature rooted in the former, and springs from it by a kind of spontaneous growth. Nor is it possible that there should be any lack of charity among men, or rather it must needs be enkindled and flourish, if men would but ponder well the charity which Christ has shown in this Sacrament. For in it He has not only given a splendid manifestation of His power and wisdom, but "has in a manner poured out the riches of His divine love towards men" (Conc. Trid., Sess. XIIL, De Euch . c. ii.). Having before our eyes this noble example set us by Christ, Who bestows on us all that He has assuredly we ought to love and help one another to the utmost, being daily more closely united by the strong bond of brotherhood. Add to this that the outward and visible elements of this Sacrament supply a singularly appropriate stimulus to union. On this topic St. Cyprian writes: "In a word the Lord's sacrifice symbolises the oneness of heart, guaranteed by a persevering and inviolable charity, which should prevail among Christians. For when our Lord calls His Body bread, a substance which is kneaded together out of many grains, He indicates that we His people, whom He sustains, are bound together in close union; and when He speaks of His Blood as wine, in which the juice pressed from many clusters of grapes is mingled in one fluid, He likewise indicates that we His flock are by the commingling of a multitude of persons made one" (Ep. 96 ad Magnum n. 5 (a1.6)). In like manner the angelic Doctor, adopting the sentiments of St. Augustine (Tract. xxxvi., in Joan. nn. 13, 17), writes: "Our Lord has bequeathed to us His Body and Blood under the form of substances in which a multitude of things have been reduced to unity, for one of them, namely bread, consisting as it does of many grains is yet one, and the other, that is to say wine, has its unity of being from the confluent juice of many grapes; and therefore St. Augustine elsewhere says: 'O Sacrament of mercy, O sign of unity, O bond of charity!' " ( Summ. Theol. P. IIL, q. lxxix., a.l.). All of which is confirmed by the declaration of the Council of Trent that Christ left the Eucharist in His Church "as a symbol of that unity and charity whereby He would have all Christians mutually joined and united. . . a symbol of that one body of which He is Himself the head, and to which He would have us, as members attached by the closest bonds of faith, hope, and charity" (Conc. Trid., Sess. XIIL, De Euchar. , c. ii.). The same idea had been expressed by St. Paul when he wrote: "For we, being many, are one bread, one body, all we who partake of the one bread" (I Cor. x., 17). Very beautiful and joyful too is the spectacle of Christian brotherhood and social equality which is afforded when men of all conditions, gentle and simple, rich and poor, learned and unlearned, gather round the holy altar, all sharing alike in this heavenly banquet. And if in the records of the Church it is deservedly reckoned to the special credit of its first ages that "the multitude of the believers had but one heart and one soul" (Acts iv., 32), there can be no shadow of doubt that this immense blessing was due to their frequent meetings at the Divine table; for we find it recorded of them: "They were persevering in the doctrine of the Apostles and in the communion of the breaking of bread" (Acts ii., 42).
Source: Mirae Caritatis (Vatican.va)