(NIV) LUKE 13:23-28
23 Someone asked him, "Lord, are only a few people going to be saved?"
He said to them, 24 "Make every effort to enter through the narrow door, because many, I tell you, will try to enter and will not be able to. 25 Once the owner of the house gets up and closes the door, you will stand outside knocking and pleading, 'Sir, open the door for us.'
"But he will answer, 'I don't know you or where you come from.'
26 "Then you will say, 'We ate and drank with you, and you taught in our streets.'
27 "But he will reply, 'I don't know you or where you come from. Away from me, all you evildoers!'
28 "There will be weeping there, and gnashing of teeth, when they see Abraham, Issac and Jacob and all the prophets in the kingdom of God, but you yourselves thrown out." ...
Any thoughts and insights about the Truth revealed here?
What i would do is realize that Jesus gave Paul the revelation of the gospel of the grace of God.
So, when you want to understand Salvation or the Grace of God, you use Paul, or you use scriptures that align themselves with Paul's theology., always.
This is why the Gospel sounds nothing like the scriptures that you posted.
Here is the Gospel.:
1 Corinthians 15:3-8
3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
4 And that he was buried, and that he rose again the third day according to the scriptures:
John 1:12
12: But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
Romans 10:9
9: that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved.