Thank you, I really appreciate your kind way of explaining things thoroughly. Though I’m still not sold on the whole “Sunday Obligation - go on Sunday, or burn in Hell” doctrine, thanks for trying!
You win this round!
Have you read Scott Hahn’s,
The Lamb’s Supper? Or a similar book that seeks to interpret the book of Revelation as a vision of what’s going on in heaven when we go to Mass? If this was John’s intent, then we have a piece of evidence that God wants Mass celebrated on the Lord’s Day since this is when the vision took place (cf. 1:10).
Also, Luke 24 and the road to Emmaus episode encourage us in this direction. Verses 1 and 13 tell us that this happened on the first day of the week (obviously… it’s resurrection Sunday!) and it is a perfect summary of the Mass, the Liturgy of the Word followed by the Liturgy of the Eucharist.
Acts 20:7 tells us they gathered to “break bread” on the first day of the week. And if we look at Luke’s gospel (since he wrote both books), we see that it is most likely the Eucharist that is referred to by these words:
“And taking the five loaves and the two fish, he looked up to heaven and said a
blessing over them. Then he
broke the loaves and gave them to the disciples to set before the crowd” (Luke 9:16 - although Luke is not at pains to place this within the context of a Eucharistic understanding, because John does so, I feel comfortable using it this way).
“And
he took bread, and when he had
given thanks, he broke it and gave it to them” (Luke 22:19).
“When he was at table with them, he took
the bread and blessed and broke it” (Luke 24:30).
Jesus appeared to the apostles after His resurrection on “the first day of the week” (v 19), and again “eight days later” (v 26), i.e., the first day of the week again if you count Sunday both times. Again this places an emphasis on Sunday.
Also, Sunday is special because of the way that it brings fulfillment to the Jewish Sabbath. The Jewish Sabbath is celebrated on the last day of the week, in order to commemorate God’s rest from His work of creation. Christians celebrate a Sabbath on the first day of the week because God inaugurated the regeneration of creation on that day with the raising of Christ from the dead. The “rest” of the Jews comes at the end of the week, after working; but the Christian Sabbath initiates the week so that our work proceeds out of our resting. In other words, we receive the rest of salvation
before we work: “created in Christ Jesus for good works” (Eph. 2).
So what is Paul criticizing in Romans and Colossians? If it is established that Sunday was indeed the day that the apostolic generation celebrated the mystery of faith, it would appear that he is criticizing heretical sects which were adding obligatory days of celebration to the days of obligation that the Church had decided upon.
The same dynamic is at work when we see Paul complaining about genealogies in 1 Tim 1:4 and Titus 3:9. Our first reaction should be, “Well, what about Matthew and Luke???”

He must not be referring to
all genealogies then…
After all of this is considered, it ultimately comes down to obedience to the Church that Christ established. In other words, we can show good reasons why we should gather on Sunday to celebrate our salvation in Christ, but the Church tells us that we have to do this because the Church has decided that this is most beneficial in the care of our souls. And Catholics believe that the Church has received the promise of Christ that “the one who hears you hears me, and the one who rejects you rejects me, and the one who rejects me rejects him who sent me” (Luke 10:16). That this is a matter of obedience to the Church is explained by the Catechism (
The Precepts of the Church: 2041-2043). It also rests on the command to love the Lord with all our hearts! (
The Third Commandment). So by obeying the Church, we express our love for God. Examples are given of “serious” reasons which excuse us from Sunday worship: illness and the care of infants.
Please let me know if there is a better way that I can approach this topic. Or if perhaps it would be more helpful for you if we demonstrated the authority that God has deigned to exercise through His Church.
May God bless you!