A. The Third Commandment is: Remember thou keep holy the Sabbath day.
A. By the Third Commandment we are commanded to keep holy the Lord's Day and the holy days of obligation, on which we are to give our time to the service and worship of God.
"Holy days" we are bound to keep holy just in the same manner we do Sundays -- that is, by hearing Mass and refraining from servile works. Those who after hearing Mass must attend to business or work on those days should make this known to their confessor, that he may judge if they have a sufficient excuse for engaging in servile works, and thus they will avoid the danger of sinfully violating an important law. There must always be a good reason for working on a holy day. Those who are so situated that they can readily refrain from servile work on holy days must do so. And, where it is possible, the same opportunity must be afforded to their servants.
"Of obligation," because there are some holy days not of obligation. We celebrate them, but we are not bound under pain of mortal sin to hear Mass or keep from servile works on such days. For example, St. Patrick's Day is not a holy day of obligation. The great feast of Corpus Christi is not a holy day of obligation. Not satisfied with doing only what the Church obliges us to do on Sundays and holy days, those who really love God will endeavor to do more than the bare works commanded. Sunday is a day of rest and prayer. While we may take innocent and useful amusement, we should not join in any public or noisy entertainments. We may rest and recreate ourselves, but we should avoid every place where vulgar and sometimes sinful amusements, scenes, or plays are presented. Even in taking lawful recreation we may serve God and please Him if we take it to strengthen our bodies that we may be enabled to do the work He has assigned to us in this world.
Sunday is well spent by those who, after hearing Mass. devote some part of the day to good works, such as pious reading, teaching in Sunday school, bringing relief to the poor and sick, visiting the Blessed Sacrament, attending Vespers, Rosary, etc. Not that I mean they should do nothing but pray on Sundays; but they should not give the whole day to useless enjoyment or idleness, and forget God. Some begrudge God even the half--hour they are obliged to give to Mass on Sundays: they stand near the door, ready to be the first out, and perhaps were the last in; or they come late, and do not give the full time necessary to hear the entire Mass. Others spend the whole day in reading newspapers, magazines, or useless -- I will not say sinful -- books. It is not a sin to read newspapers, etc., on Sunday; but to give the whole time to them, and never read anything good and instructive, is a willful waste of time--and waste of time is sinful. There should be in every family, according to its means, one or more good Catholic newspapers or magazines. Not all papers that bear the name of Catholic are worthy of it. A truly Catholic paper is one that teaches or defends Catholic truth, and warns us against its enemies, their snares, deceptions, etc.; one, too, that tells us what is being done in the interests of religion, education, etc. Besides such a paper there should be a few standard good books in every family such as the New Testament, the Imitation of Christ, a large and full catechism of Christian doctrine, etc. On the other hand, all the books in your house need not be books treating of religion or piety. Any book that is not against faith or morals may be kept and read. A book may not be bad in itself, but it may be bad for you, either because it is suggestive of evil, or you misunderstand it, and take evil out of it. In such a case you should not read it. At the present time there are so many bad books that persons should be very careful as to what they read.
Not only should we keep Sunday well ourselves, but we should endeavor to have it so kept by others. We must be careful, however, not to fall into the mistake of some who wish the Sunday to be kept as the Pharisees of old kept the Sabbath, telling us we must not walk, ride, sail, or take any exercise or enjoyment on that day. This is not true, for Our Lord rebuked the Pharisees for such excessive rigor; God made the Sunday for our benefit, and if we had to keep it as they say we must, it would be more of a punishment than a benefit.
A. We are to worship God on Sundays and holy days of obligation by hearing Mass, by prayer, and by other good works.
A. The Sabbath day and the Sunday are not the same. The Sabbath is the seventh day of the week, and is the day which was kept holy in the Old . Law; the Sunday is the first day of the week, and is the day which is kept holy in the New Law.
"Old Law" means the law that God gave to the Jews, the New Law, the law that Our Lord gave to Christians.
A. The Church commands us to keep the Sunday holy instead of the Sabbath because on Sunday Christ rose from the dead, and on Sunday He sent the Holy Ghost upon the Apostles.
We keep Sunday instead of Saturday also to teach that the Old Law is not now binding upon us, but that we must keep the New Law, which takes its place.
A. The Third Commandment forbids all unnecessary servile work and whatever else may hinder the due observance of the Lord's day.
A. Servile works are those which require labor rather of body than of mind.
"Servile" -- that is, work which was formerly done by the slaves. Therefore writing, reading, studying, etc., are not servile, because they were not the works of slaves.
A. Servile works are lawful on Sunday when the honor of God, the good of our neighbor, or necessity requires them.
"Honor of God"; for example, erecting an altar that could not be erected at another time, so that the people may hear Mass on that day.
"Good of our neighbor" -- such as reconstructing a broken bridge that must be used every day; or clearing away obstacles after a railroad accident, that trains may not be delayed. "Necessity" -- firemen endeavoring to extinguish a fire, sailors working on a ship at sea, etc.