Epistle of Barnabas, XV, 8-9
The present sabbaths are not acceptable to me, but that which I have made, in which I will give rest to all things and make the beginning of an eighth day, that is the beginning of another world. Wherefore we also celebrate with gladness the eighth day.
TC, I have posted this one to you before, yet you persist. This shows with absolute clarity that the ECF were keeping the Sabbath. It also shows, for the benefit of our Catholic friends, that at least this guy believed that he had the power to change stuff. Readers, please pay careful attention, as the author says the present Sabbaths - plura. They were keeping the holy days as well. Also pay close attention that he writes that the Sabbaths were unacceptable to him, it mentions nothing of scripture or God's will.
There is much debate as to whether this author is referencing the 8th day as being the 8th millenia after the 1000 years or if he is referencing the 8th day of the Hellenists, which as you may know, was Sunday - the venerable day of the sun, not the venerable day of the Son.
You are delirious. It shows no such thing. The contrast in Barnabas is between the practices of the apostate Jews ("Your present sabbaths") and the practice of the church ("we also celebrate").
If you actually read the entire argument from Barnabas you would see this.
Further, He says to them [the Jews], “Your new moons and your Sabbath I cannot endure.” Ye perceive how He speaks: Your [the Jews] present Sabbaths are not acceptable to Me, but that is which I have made, [namely this,] 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 [the church] keep the eighth day with joyfulness, the day also on which Jesus rose again from the dead.. And when He had manifested Himself, He ascended into the heavens.Barnabas was the earliest of the extra-biblical church fathers who wrote on this subject. It is clear that by his time that the church had established worship on the first day on apostolic authority, as opposed to the apostate Jews who continued to worship on the last day.
The present sabbaths are not acceptable to me, but that which I have made, in which I will give rest to all things and make the beginning of an eighth day, that is the beginning of another world. Wherefore we also celebrate with gladness the eighth day.
TC, I have posted this one to you before, yet you persist. This shows with absolute clarity that the ECF were keeping the Sabbath. It also shows, for the benefit of our Catholic friends, that at least this guy believed that he had the power to change stuff.
You are very confused. The "guy" doing the speaking, here, up to the word "world," is God, not Barnabas.
Read the passage in context:
Moreover concerning the Sabbath likewise it is written in the Ten Words, in which He spake to Moses face to face on Mount Sinai; And ye shall hallow the Sabbath of the Lord with pure hands and with a pure heart.
And in another place He saith: If my sons observe the Sabbath then I will bestow My mercy upon them.
Of the Sabbath He speaketh in the beginning of the creation; And God made the works of His hands in six days, and He ended on the seventh day, and rested on it, and He hallowed it.
Give heed, children, what this meaneth; He ended in six days. He meaneth this, that in six thousand years the Lord shall bring all things to an end; for the day with Him signifyeth a thousand years; and this He himself beareth me witness, saying; Behold, the day of the Lord shall be as a thousand years. Therefore, children, in six days, that is in six thousand years, everything shall come to an end.
And He rested on the seventh day. this He meaneth; when His Son shall come, and shall abolish the time of the Lawless One, and shall judge the ungodly, and shall change the sun and the moon and the stars, then shall he truly rest on the seventh day.
Yea and furthermore He saith: Thou shalt hallow it with pure hands and with a pure heart. If therefore a man is able now to hallow the day which God hallowed, though he be pure in heart, we have gone utterly astray.
But if after all then and not till then shall we truly rest and hallow it, when we shall ourselves be able to do so after being justified and receiving the promise, when iniquity is no more and all things have been made new by the Lord, we shall be able to hallow it then, because we ourselves shall have been hallowed first.
Finally He saith to them: Your new moons and your Sabbaths I cannot away with. Ye see what is His meaning: it is not your present Sabbaths that are acceptable [unto Me], but the Sabbath which I have made, in the which, when I have set all things at rest, I will make the beginning of the eighth day which is the beginning of another world.
Wherefore also we keep the eighth day for rejoicing, in the which also Jesus rose from the dead, and having been manifested ascended into the heavens.
Barnabas isn't talking about any Christians observing the Jewish Sabbath, he's talking about the Christian Sabbath on the "eighth day" doing away with the seventh day Sabbath, and isn't claiming to do it on his own authority, but is saying that God did it by raising Jesus from the dead.
BTW, a much better-attested source than the Epistle of Barnabas still blows you out of the water:
Never allow yourselves to be led astray by false teachings and antiquated and useless fables. Nothing of any use can be got from them. If we are still living in the practice of Judaism, it is an admission that we have failed to receive the gift of grace ... We have seen how the former adherents of the old customs have since attained to a new hope; so that they have given up keeping the sabbath, and now order their lives by the Lord's Day instead (the day when life first dawned for us, thanks to Him and his death ...) ... To profess Jesus Christ while continuing to follow Jewish customs is an absurdity. The Christian faith does not look to Judaism, but Judaism looks to Christianity, in which every other race and tongue that confesses a belief in God has now been comprehended. -- Ignatius of Antioch, Epistle to the Magnesians, AD 107
Ignatius was a friend of at least three of the Apostles (Peter, Paul, and John), and was the third bishop of Antioch after St. Peter. He was fed to the lions in the arena in Rome; this letter was written on his way to his martyrdom.