The Council of Trent addressed this issue of Catholic laity not receiving Holy Communion and urged frequent reception of the Eucharist by the laity at Mass, provided that they were free of Mortal Sin. Many of the great religious orders founded after the Reformation, like the Society of Jesus, the Oratorians, the Redemptorists, and others, encouraged the laity to receive Holy Communion and also aided the laity with devotions and prayers.
Jansenism, a heretical movement beginning in France during the seventeenth and eighteenth centuries, discouraged frequent Communion. Pope St. Pius X referred to this problem in his “Sacra Tridentina: On Frequent and Daily Reception of Holy Communion,” issued on December 20, 1905:
Piety, however, grew cold, and especially afterward because of the widespread plague of Jansenism, disputes began to arise concerning the dispositions with which one ought to receive frequent and daily Communion; and writers vied with one another in demanding more and more stringent conditions as necessary to be fulfilled. The result of such disputes was that very few were considered worthy to receive the Holy Eucharist daily, and to derive from this most health-giving Sacrament its more abundant fruits; the others were content to partake of it once a year, or once a month, or at most once a week. To such a degree, indeed, was rigorism carried that whole classes of persons were excluded from a frequent approach to the Holy Table, for instance, merchants or those who were married.
Although, as Pope St. Pius X wrote, several of his predecessors made statements against these rigorist views,
The poison of Jansenism, however, which, under the pretext of showing due honor and reverence to the Eucharist, had infected the minds even of good men, was by no means a thing of the past. The question as to the dispositions for the proper and licit reception of Holy Communion survived the declarations of the Holy See, and it was a fact that certain theologians of good repute were of the opinion that daily Communion could be permitted to the faithful only rarely and subject to many conditions.
They held that daily Communion was prescribed by divine law and that no day should pass without communicating, and besides other practices not in accord with the approved usage of the Church, they determined that the Eucharist must be received even on Good Friday and in fact so administered it.
So Pope St. Pius X stated unequivocally that members of the laity were to be encouraged to receive Holy Communion frequently, even daily, as long as they had the correct disposition and were not in a state of Mortal Sin. He called on both factions to unite around this discipline and not place obstacles in the way of the lay faithful. For this document, and his decision on the proper age for First Holy Communion, Pope St. Pius X became known as “the Pope of the Eucharist”.
In 1910 he approved a “Decree of the Sacred Congregation of the Discipline of the Sacraments on First Communion” setting the age of discretion or reason at about age seven. Inspired by the verse from the Synoptic Gospels: "Let the little children come to me, and do not hinder them, for of such is the kingdom of God”; he again urged that the Church unite around this discipline because of the sacramental benefits of Holy Communion.
Giuseppe Sarto succeeded Pope Leo XIII in 1903 and began his reign at Pope Pius X with the motto “To Restore all Things in Christ” (Ephesians 1:10). Among other liturgical reforms, he also revised the Breviary and issued the motu proprio “Tra le Sollecitudini” in 1903 soon after becoming pope encouraging not only the revival of Gregorian chant in the celebration of Mass, but active participation by the laity in chant. He acknowledged progress in the arts by commending the use of Renaissance polyphony (especially the works of Palestrina), but warned against any “theatrical” or “profane” influences in liturgical music.
Pope Pius X died in on August 20, 1914 at the beginning of World War I and was succeeded by Benedict XV. In 1954 he was canonized and his feast is on August 21 (since St. Bernard of Clairvaux’s feast is on August 20).
Pope St. Pius X, the Pope of the Eucharist, pray for us!