Moral Theology / A Complete Course Based on St. Thomas Aquinas and the Best Modern Authorities

by John A. McHugh; Charles J. Callan

2575. The First Precept of the Church.—This precept commands that on Sundays and holydays of obligation Mass be heard and servile and other like works be omitted (Canons 1247-1249) by the subjects of church laws (427 sqq.).

(a) This precept is of natural and divine law as to its purpose and substance, for reason teaches and the Third Commandment of the Decalogue prescribes that man set aside some time for the external worship of God, and avoid those things that distract him from worship (Catechism of the Council of Trent, pp. 396 sqq,). Hence, even non-Catholics, though they do not sin by missing Mass (429, 430), are guilty of sin if they do not from time to time worship God externally.

(b) This precept is of ecclesiastical law only as to its details (i.e., the time set apart and the manner of worship and sanctification decreed). The Old Testament Law observed the Sabbath or last day of the Week in memory of the creation of the World, and it abstained most rigorously from work on the Sabbath, because there was a divine prohibition and because this rest was a figure of things to come. But in the New Law the ceremonial precepts of Judaism no longer have force, and the Christian precepts substituted for them were not instituted by Christ Himself but arose from the custom of the Church. During the lifetime of the Apostles themselves Sunday (or the first day of the week) came to be venerated as the Lord’s Day in memory of the Resurrection, which completed the work of Redemption (Acts, ii. 46, iii. 1, v. 12, xxi. 26); and from early times various special holydays were appointed and made days of obligatory worship, as had been the case with certain feasts in the Old Testament. As early as the third and fourth centuries laws were made confirming the primitive customs of assisting at Mass and resting on Sundays and holydays.

2576. The Affirmative and Negative Parts of the First Precept.—The first precept of the Church has two parts, an affirmative (preceptive) part which commands the hearing of Mass, and a negative (prohibitive) part which forbids the doing of servile works. The law is therefore most salutary and simple, requiring that one take part in the greatest act of worship, the sacrifice which is a commemoration of Christ, and that one rest from the labors and cares of the week and be spiritually refreshed. In reference to the Mass, the precept requires that Mass itself be heard, and that it be an entire Mass and the same Mass.

(a) Thus, Mass itself must be heard, and hence one does not satisfy the Sunday obligation by attending other services that precede (e.g., the Asperges, blessing of palm), accompany (e.g., sermon), or follow (e.g., Vespers, Benediction) the celebration of Mass. Neither does this precept oblige one to attend other services on Sunday, although it is most suitable to do this, also to make internal acts of faith, hope and charity, and to read pious books and perform works of charity, and it is sometimes necessary as a natural obligation to attend the sermon or catechetical instruction (see 914 sqq.).

(b) A whole Mass must be heard, that is, all the ceremonies from the prayers at the foot of the altar until the blessing at the end, and it is irreverent to leave church without necessity before the priest has left the altar. He who can assist at only the essential and integral parts of the sacrifice (i.e., from the Consecration to the Communion), is obliged to so much; but he who arrives after the Consecration and cannot hear another Mass is not obliged according to one opinion to remain for the present Mass, since the Consecration, the essential part, is already past.

(c) The same Mass must be heard, and hence one cannot satisfy the obligation by hearing the first half of one Mass being said on one altar and the second half of another Mass being said simultaneously on another altar (see Denzinger, n. 1203), nor by hearing the Consecration in one Mass and the Communion in a previous or subsequent Mass, thus dividing the sacrifice. But if one may have heard from the Consecration to the end in one Mass, one may hear the omitted pre-Consecration parts, it seems, in another Mass that follows, and one should do this if possible.

2577. How Mass Must Be Heard.—In reference to the person who hears Mass, the positive part of the precept calls for external assistance and internal devotion.

(a) Thus, the external or bodily assistance must be such that one can be said to take part in the divine worship. This happens when one is physically present, that is, when one is in the same building or place as the celebrant and can either see or hear him, or is morally present, that is, not in the same building but able to see or hear him naturally (e.g., by looking from the window of a neighboring house), or is unable to see or hear him but joined with the congregation (e.g., those who are outside the closed doors of the church but who can follow the bells and choir to some extent, those who are inside with the congregation but behind a pillar that shuts off the view). In a field Mass amplifiers can carry the voice far out to the edge of a vast crowd. But there does not seem to be a sufficient moral presence when Mass is “seen” by television or “heard” over the radio, since in these cases one is not present to the consecrated species or united to the worshippers.

(b) Internal or mental assistance requires the actual or virtual intention of the will to perform what the Church requires (see 2165), and the attention of the mind, external according to some, internal according to others (see 2166 sqq.). Thus, he who goes to church merely to hear the music or look at the pictures does not hear Mass for lack of intention; he who sleeps soundly all through the service does not hear Mass for lack of attention. One who knows what is going on before him, but whose thoughts are not on any religious matter, complies with the precept of the Church according to some, but he sins by irreverence and voluntary distraction. It suffices during Mass to think either on the Mass itself (which is the best attention), or to think on other pious subjects (e.g., to make an examination of conscience, to say the Rosary). Certain actions (e.g., those that are related to the Mass, such as ringing the bell, taking up the collection, playing the organ) do not exclude external attention, but others certainly exclude it (e.g., writing a letter), and others are doubtful (e.g., going to Confession).