yes
yes
but sin cannot lead one away from salvation
yes
but sin cannot lead one away from salvation
and "no one" includes even the one in Jesus' and God's hand cannot remove themselves from Jesus' or God's hand.
That is straightforward. But what's not taught in Scripture is any teaching about the sealing with the Holy Spirit being undone or unsealed.
Then was Paul in error to tell the Corinthian church the result of their abuse of the Lord's Table (sinning) when he mentioned physical death? And what about Ananias and Sapphira who died physically for lying to the Holy Spirit? We cannot ignore these clear examples from Scripture.
It can and it does. If John meant eternal death, then that teaching is in conflict with Paul's teaching that eternal life, a gift of God, is irrevocable. Or Jesus' teaching that those given eternal life will never perish. Or Peter's teaching that we have been born again of imperishable seed. This speaks of spiritual life, which cannot perish.
I think you might be confused with what Paul taught and what you think he taught. Where do you find that sin will not lead you away from Christ?
1 John 5:16 (ESV)
If anyone sees his brother committing a sin not leading to death, he shall ask, and God will give him life--to those who commit sins that do not lead to death. There is sin that leads to death; I do not say that one should pray for that.
I think you might want to step back and consider the way your trying to make pieces of the Bible fit. We can't pull one verse from here, and another from some place else, and then say that others don't mean what they say - because we want to believe that it can't be so.
Jeremiah 2:22 (ESV) 22 Though you wash yourself with lye and use much soap, the stain of your guilt is still before me, declares the Lord GOD.
Jeremiah 2:23 (ESV) 23 How can you say, 'I am not unclean, I have not gone after the Baals'? Look at your way in the valley; know what you have done--a restless young camel running here and there,
Jeremiah 2:24 (ESV) 24 a wild donkey used to the wilderness, in her heat sniffing the wind! Who can restrain her lust? None who seek her need weary themselves; in her month they will find her.
The eternal life you speak of is only in Christ. It is not something that you posses, unless you think you are like God? Eternal life lives in you, and only through the Spirit does it give you life.
If sin did not result in physical death, then your argument against Johns teaching would have grounds to stand on. But John is contrasting sin that does not lead to death, and sin that does. ALL sin leads to physical death, but only one sin leads to eternal death of the soul.
Jeremiah 2
31 And you, O generation, behold the word of the LORD. Have I been a wilderness to Israel, or a land of thick darkness?
Why then do my people say, 'We are free, we will come no more to you'?
32 Can a virgin forget her ornaments, or a bride her attire? Yet my people have forgotten me days without number.
33 "How well you direct your course to seek love! So that even to wicked women you have taught your ways.
34 Also on your skirts is found the lifeblood of the guiltless poor; you did not find them breaking in.
Yet in spite of all these things
35 you say, 'I am innocent; surely his anger has turned from me.' Behold, I will bring you to judgment for saying, 'I have not sinned.'
36 How much you go about, changing your way! You shall be put to shame by Egypt as you were put to shame by Assyria.
37 From it too you will come away with your hands on your head, for the LORD has rejected those in whom you trust, and you will not prosper by them.