@Xeno.of.athens , I am confused. I keep the 7th day as a Sabbath day of rest. I am thrilled that you appear to be supporting this too. But I thought that you were Catholic, and that Catholics worship on the 1st day, citing that the Church had authority to make that change. Can you help me understand?
Best wishes,
KT
What I am supporting is the concept of a day (or more) of rest for servants as well as masters. I am not advocating for seventh day observance nor for first day observance. Both days will fulfil the day of rest commanded in the commandment. Catholic teaching on the matter is covered at some length in the Catechism of the Catholic Church and the Catechism of the Council of Trent.
Following are some sections from the Catechism of the Council of Trent.
CCT 2153 THE THIRD COMMANDMENT: "Remember that thou keep holy the sabbath day. Six days shalt thou labour and do all thy works; but on the seventh day is the sabbath of the lord thy god; thou shalt do no work on it, neither thou nor thy son, nor thy daughter, nor thy manservant, nor thy maidservant, nor thy beast, nor the stranger that is within thy gates. For in six days the lord made heaven and earth, and the sea, and all things that are in them, and rested on the seventh day; wherefore the lord blessed the seventh day and sanctified it."
CCT 2158 The importance of its observance for the faithful may be inferred from the consideration that those who carefully comply with it are more easily induced to keep all the other Commandments. For among the other works which are necessary on holydays, the faithful are bound to assemble in the church to hear the Word of God. When they have thus learned the divine justifications, they will be disposed to observe, with their whole heart, the law of the Lord. Hence the sanctification and observance of the Sabbath is very often commanded in Scripture, as may be seen in Exodus, Leviticus, Deuteronomy, and in the prophecies of Isaias, Jeremias, and Ezechiel, all of which contain this precept on the observance of the Sabbath.
CCT 2163 This Commandment about the observance of the Sabbath, on the other hand, considered as to the time appointed for its fulfilment, is not fixed and unalterable, but susceptible of change, and belongs not to the moral, but the ceremonial law. Neither is it a principle of the natural law; we are not instructed by nature to give external worship to God on that day, rather than on any other. And in fact the Sabbath was kept holy only from the time of the liberation of the people of Israel from the bondage of Pharaoh. The observance of the Sabbath was to be abrogated at the same time as the other Hebrew rites and ceremonies, that is, at the death of Christ. Having been, as it were, images which foreshadowed the light and the truth, these ceremonies were to disappear at the coming of that light and truth, which is Jesus Christ. Hence St. Paul, in his Epistle to the Galatians, when reproving the observers of the Mosaic rites, says: You observe days and months and times and years; I am afraid of you lest perhaps I have laboured in vain amongst you. And he writes to the same effect to the Colossians.
CCT 2179 We now come to the meaning of the word sabbath. Sabbath is a Hebrew word which signifies cessation. To keep the Sabbath, therefore, means to cease from labour and to rest. In this sense the seventh day was called the Sabbath, because God, having finished the creation of the world, rested on that day from all the work which He had done. Thus, it is called by the Lord in Exodus.
CCT 2180 Later on, not only the seventh day, but, in honour of that day, the entire week was called by the same name; and in this meaning of the word, the Pharisee says in St. Luke: I fast twice in a sabbath. So much will suffice with regard to the signification of the word sabbath.
CCT 2182 In the Scriptures keeping holy the Sabbath means a cessation from bodily labour and from business, as is clear from the following words of the Commandment: Thou shalt do no work on it. But this is not all that it means; otherwise, it would have been sufficient to say in Deuteronomy, Observe the day of the sabbath; but it is added, and sanctify it; and these additional words prove that the Sabbath is a day sacred to religion, set apart for works of piety and devotion.
CCT 2183 We sanctify the Sabbath fully and perfectly, therefore, when we offer to God works of piety and religion. This is evidently the Sabbath, which Isaias calls delightful; for festivals are, as it were, the delight of God and of pious men. And if to this religious and holy observance of the Sabbath we add works of mercy, the rewards promised us in the same chapter are numerous and most important.
CCT 2184 The true and proper meaning, therefore, of this Commandment tends to this, that we take special care to set apart some fixed time, when, disengaged from bodily labour and worldly affairs, we may devote our whole being, soul and body, to the religious veneration of God.
CCT 2186 The second part of the precept declares that the seventh day was consecrated by God to His worship; for it is written: Six days shalt thou labour, and do all thy works; but on the seventh day is the sabbath of the Lord thy God. From these words we learn that the Sabbath is consecrated to the Lord, that we are required on that day to render Him the duties of religion, and to know that the seventh day is a sign of the Lord's rest.
CCT 2188 This particular day was fixed for the worship of God, because it would not have been well to leave to a rude people the choice of a time of worship, lest, perhaps, they might have imitated the festivals of the Egyptians.
CCT 2189 The last day of the week was, therefore, chosen for the worship of God, and in this there is much that is symbolic. Hence in Exodus,' and in Ezechiel the Lord calls it a sign: See that you keep my sabbath because it is a sign between me and you in your generation, that you may know that I am the Lord who sanctify you.
There is more to be said, and the CCC offers more still. But this is sufficient for now.