>> “care to name any Christians in the first 400 years who kept the 7th day sabbath?” <<
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Let’s stick with the ones listed in God’s word:
John, Peter, Paul, Timothy, Luke, the congregations of Corinth, Thessalonica, Ephesus, Galatia, Phillipi, and Colosse.
Every instance in the epistles written to these churches was a celebration of one of YHWH’s appointed feasts, or had you noticed that fact?
The only gatherings mentioned that were not on a feast or sabbath, were to collect money, which was forbidden on a sabbath.
Try actually reading these epistles for meaning, to capture the story being told. The Holy Spirit carefully assured that the only writings that would survive were about the feasts and sabbaths, isn’t that interesting?
There is no Scriptural injunction to go to church, or go once a week, or any of the things that we've added to Christianity to turn it into churchianity.
It's holding to a form of godliness but denying the power of it.
Christians are to transformed by the renewing of their minds and that comes through Bible study and prayer and intimate, personal communion with God.
If the way someone thinks isn't changed, the way he acts isn't going to change either.
Psalm 119:11 I have hidden your word in my heart that I might not sin against you.
ok, let’s stick to the written Word.
please show me in the NT where any Gentiles, who had no history of keeping the Sabbath, were ever told to keep the 7th day Sabbath.
Christians don’t celebrate the feasts anymore and never have for one simple reason:
they were types and shadows pointing to Christ. CHRIST HAS COME, THE NEED FOR TYPES AND SHADOWS WAS DONE AWAY WITH.
for example, the feast of first fruits was fulfilled when Jesus rose from the dead on the feast of first fruits.
Jesus is the reality, the feast pointed to him.
We celebrate His death for our salavation in the manner He Himself established, the Eucharist.