Show me why Sunday is the Day

The pope didn't change the Sabbath to Sunday. He made Sunday into a day of rest, where there was no day of rest practiced in the early church. In other words, he restored an Old Testament practice that had not been practiced for centuries, and when he restored it, he put it on a different day, because that day was important to Christians.I don't think this is right, and most Protestants do not regard Sunday as a Sabbath any more.In the early church, no specific day of rest was kept except among Jewish believers, who did continue to keep a 7th day (Saturday) Sabbath. The 1st century Letter to Diognetus says that Jewish Sabbath keeping is unworthy of notice, Justin's Apology of around AD 150 says Christians met early in the morning on Sunday, and his Dialogue with Trypho makes it clear that it was widely known that Christians neither kept a Sabbath, offered sacrifices, kept the food laws, or circumcised their children.The Bible answer is that Paul said all those things were simply shadows of things to come. ("Feasts, New Moons, and Sabbaths" are a common way to refer to the yearly, monthly, and weekly special days. Look that phrase up in a concordance sometime. Col 2 is definitely referring to the weekly Sabbath.)The Gentiles were given four ordinances of Moses to follow. Sabbath keeping was not one of them.On the other hand, the early church believed that resting daily in Christ was the true Sabbath ("If, therefore, any one can now sanctify the day which God hath sanctified, except he is pure in heart in all things, we are deceived" [Letter of Barnabas, ch. 15, c. AD 130]).Sunday was a special day of celebration, however, even though it was not a Sabbath. Kneeling in prayer was disallowed on that day, because it was a day of joy. Barnabas wrote, "Ye perceive how He speaks: Your present Sabbaths are not acceptable to Me, but that is which I have made, when, giving rest to all things, I shall make a beginning of the eighth day, that is, a beginning of another world. Wherefore, also, we keep the eighth day with joyfulness, the day also on which Jesus rose again from the dead" [ibid. 15]. Sunday was not the 1st day, but the 8th day, to them.So, as I said, the pope did not change the day. He resurrected Sabbath-keeping, and while he was doing that moved it to Sunday, because that was the only day the Christians were celebrating.

Actually, Sabbath means seven.

On the Sabbath meaning seven or rest, you're right. I had read a definition from the New Testament once that said it means seven days or a week, which is indeed what Strong's says in its Greek section. I didn't realized they would say that and not refer back to the Hebrew which is from a root word meaning cease, desist, or rest.Ok, on to the other stuff.I'm not Catholic, and I didn't get my doctrines from the Catholics, so all the Catholic stuff is irrelevant. Explanation is a fact of life that everyone has to do, especially those who would continue keeping a Sabbath rest day when from the beginning the Gentile Christians did not. We have two choices, we can explain why the early Christians did not feel compelled to keep the Sabbath, which would at least be honest, or we can dishonestly pretend like they did keep it and try to explain away Paul's statement that it was merely a shadow and that Christ had blotted out the handwriting of ordinances which was against us.I am only explaining. The Sabbath is a Jewish law. That's true, and I'm not going to explain it away. The Pope did re-establish Sabbath keeping long after Christianity had married itself to the world government. That's true, and I'm not going to explain it way. He did change it to Sunday at the time. That's true, and I'm not going to explain it away.In between, from the time of Paul until the Pope reinstated Sabbath keeping, the church, at least the Gentiles in it, did not keep the Sabbath. I am simply explaining why.Sabbath keepers, on the other hand, have to pretend like the early church did keep the Sabbath. Entire books are published attempting to rewrite history. Obscure quotes are pulled out of context in order to deceive the ignorant in those books. The early church did not keep the Sabbath, that's true, and I won't explain it away, but Sabbath keepers do it all the time.Sabbath keepers also have to explain away Colossians 2, trying to make it say something it doesn't.Explaining away is deceitful. Explaining, which is not deceitful, but simply gives the reasons for what is true, is a necessary part of all of life, including religion. I am not doing any explaining away. God has requirements of Christians. "He that says, 'I know him,' and does not keep his commandments, is a liar and the truth is not in him." The early church did not single out the Sabbath command. They applied Christ's principle of expansion or bringing to fullness to all the commands, including the ones about murder and adultery. The Jews kept one day, because they were God's fleshly nation. More is required of Christians. They are to keep every day holy, sanctifying it by their lives.All the commands are similarly expanded. They are not just to avoid murder, but even being angry with their brother. They are not just to avoid adultery, but even lustful looking.