fhansen said in post #162:
So did the apostles definitively relate to the followers that Jesus is really present in the Eucharist-the Lord's Supper-or not? Or that baptism is necessary for regeneration/salvation? Or that infant baptism is salvific?
Regarding infant baptism being salvific, note that sola scriptura doesn't teach that.
For unless God wants to make an exception for an elect individual (Exodus 33:19b, Romans 9:15), infant baptism isn't valid, because baptism is useless for salvation, and isn't even allowed, unless the one being baptized is already a believer with all his heart that Jesus Christ is the Son of God (Acts 8:36-38, Mark 16:16). Also, Christians need to be not just sprinkled with water, as is often done with infant baptism, but water-immersion (burial) baptized (Romans 6:3-11, Colossians 2:12) in order to be ultimately saved (Mark 16:16; 1 Peter 3:21, Galatians 3:27, Acts 2:38, Acts 22:16).
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That is, in order to be saved ultimately, Christians must get water-
immersion (burial) baptized into Jesus Christ's death for our sins (Romans 6:3-11, Colossians 2:12, Mark 16:16; 1 Peter 3:21, Galatians 3:27, Acts 2:38, Acts 22:16). For the original Greek noun for "baptism" (baptismos) is derived from the original Greek verb for "baptize" (baptizo), which means to immerse. For it's derived from the original Greek verb "bapto", which means to cover wholly with a fluid. We are to be "buried" in the water of baptism (Romans 6:4, Colossians 2:12), and no one is buried by merely having some water sprinkled on his forehead. Even the
Catholic Encyclopedia admits: "In the Latin Church, immersion seems to have prevailed until the twelfth century. After that time it is found in some places even as late as the sixteenth century. Infusion and aspersion, however, were growing common in the thirteenth century and gradually prevailed in the Western Church". On what basis did the Catholic Church, or any other church for that matter, abandon the requirement of immersion?
fhansen said in post #162:
Or that God is one God in three persons?
Yes, sola scriptura definitely teaches that.
For it shows that Jesus Christ is God (John 1:1,14, John 10:30, John 20:28, Titus 2:13, Philippians 2:6, Matthew 1:23). And He is uncreated God, just as God the Father is uncreated God. For everything created was created by Jesus (John 1:3, Colossians 1:16-17). Because Jesus is uncreated, there was never a time when He was not. He has always existed. He's YHWH the Holy One, from everlasting (Habakkuk 1:12a, Acts 3:14, Micah 5:2c). He's YHWH the only Savior (Isaiah 43:11, Titus 2:13), YHWH the good shepherd (Psalms 23:1, John 10:11, Mark 10:18), YHWH who will set His feet on the Mount of Olives at His return (Zechariah 14:3-4, Acts 1:11-12), YHWH the first and last (Isaiah 44:6, Revelation 2:8), YHWH the great I AM (Exodus 3:14, John 8:58), the great God (Titus 2:13), the mighty God (Isaiah 9:6), one God with God the Father (John 10:30, John 20:28), equal in divinity with God the Father (Philippians 2:6).
Just as the Trinity of Father, Son and Holy Spirit (Matthew 28:19) is the three distinct, coexisting Persons (Mark 1:9-11) of God the Father (Galatians 1:3), God the Son (Hebrews 1:8) and God the Holy Spirit (cf. Mark 13:11 and Matthew 10:19-20; Acts 5:3-4), so the Trinity is YHWH the Father, YHWH the Son and YHWH the Holy Spirit. For YHWH is the only God (Isaiah 45:5-6). He has always been and forever will be the only God (Isaiah 43:10b).
fhansen said in post #162:
Or that they couldn't practice the observance of a day of rest and worship on the Lord's Day rather than the Sabbath?
No, for sola scriptura shows that Christians, whether Jews or Gentiles, don't have to keep the sabbath of the letter of the Old Covenant Mosaic law. For even the letter of the 10 commandments written and engraven in stones (2 Corinthians 3:7, Deuteronomy 4:13) was part of the abolished Old Covenant Mosaic law's ministration of death (2 Corinthians 3:6-7, Exodus 31:15b), which has been replaced by the New Covenant (Jeremiah 31:31-34) ministration of the Spirit (2 Corinthians 3:6-18), in which Christians are delivered from the letter of the Old Covenant Mosaic law and keep the spirit (Romans 7:6) of all the Old Covenant Mosaic law's commandments by loving others (Romans 13:8-10).
Saying Christians have to keep the letter of the Old Covenant Mosaic-law sabbath is just as mistaken as saying Christians have to keep the letter of the Old Covenant Mosaic-law circumcision (Acts 15:1-11). If Christians keep the letter of the Old Covenant Mosaic-law sabbath thinking they have to because it's part of the letter of the Old Covenant Mosaic law, they're as fallen from grace (Galatians 5:4) as Christians who keep the letter of the Old Covenant Mosaic-law circumcision thinking they have to because it's part of the letter of the Old Covenant Mosaic law (Galatians 5:2). They've become debtors to perform the letter of the entire Old Covenant Mosaic law (Galatians 5:3). They've placed themselves under its curse (Galatians 3:10, Deuteronomy 27:26).
So no Christian should ever desire to go back into bondage under the letter of any part of the Old Covenant Mosaic law (Galatians 4:21 to 5:8). Christians need to keep the sabbath only in spirit, not in the letter (Romans 7:6). Christians must never judge other Christians for not keeping the letter of the Old Covenant Mosaic-law sabbath (Colossians 2:16), which letter was abolished on the New Covenant Cross of Jesus Christ along with all the rest of the letter of the Old Covenant Mosaic law (Colossians 2:14-17, Ephesians 2:15-16, Romans 7:6, Hebrews 7:18-19, Hebrews 10:9b, Hebrews 10:1-23, Matthew 26:28).
For its letter was merely a shadow; now it all comes down to Jesus Christ Himself (Colossians 2:17). Jesus' New Covenant sabbath rest (Matthew 11:28-30), which all Christians enter by faith (Hebrews 4:3-4), exceeds in righteousness (cf. Matthew 5:20) the abolished letter of the Old Covenant Mosaic-law sabbath. For under the New Covenant sabbath, Christians must cease from their own works, as in those done apart from abiding in Jesus (John 15:4-5), every day of the week (Hebrews 4:3,10, Luke 9:23). And they can esteem every day of the week (Romans 14:5).
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Also, Christians should be worshipping God every day of the week (Hebrews 13:15, cf. Psalms 145:2). And they should be meeting together every day of the week (Hebrews 3:13, Hebrews 10:25), at least in some fashion (Matthew 18:20), such as on this forum. The early Church started assembling together on the Lord's day (commonly called Sunday) instead of on the sabbath (commonly called Saturday) because the Lord's day, the 1st day of the week, was the day on which Jesus Christ physically resurrected (Mark 16:9) from the dead: "no longer observing the sabbath, but living in the observance of the Lord's Day, on which also our life has sprung up again by Him" (Epistle of Ignatius to the Magnesians, chapter 9. Ignatius was a contemporary of the apostle John. Compare John's reference to "the Lord's day" in Revelation 1:10).
But it's not a requirement for Christians to assemble together only on the Lord's day or to esteem the Lord's day above every other day of the week. It's also okay for Christians to choose to assemble together on the sabbath because they esteem the sabbath above every other day of the week. It's also okay for Christians to esteem every day of the week (Romans 14:5). Christians are never to judge each other over this matter but are simply to do what they believe Jesus Christ wants them as individuals to do (Romans 14:4-13). So the point isn't for Christians to esteem days but to focus on the person of Jesus Himself (Colossians 2:16-17).
Also, how do those who think they must keep the letter of the Old Covenant sabbath, keep the letter of the sabbath of Leviticus 25?