Good evening Drew. What you said is dead on that salvation does indeed guarantee eternal life, but we have to maintain that level of salvation through prayer and obedience to God's Word, we have to be as the Word warns, watchful and prayerful, and as the Lord said as well 'men are to always pray and not faint.<quoted text>
When the Word is rightly divided, then all of the scripture that you have posted will make sense in its proper context.
You said, "Yes, he paid the penalty for sin. But, even this is temporary." This is true, and the age of grace will end and God will once again deal with the Jews. The body (church) will no longer be here on earth, and sacrifices will once again be the order of the day.
Only portions of the 4 gospels and most of the book of Acts are written to the church along with Paul's epistles (Romans through Philemon), and they are written for this present age, the age of grace which began at Pentecost and will end in the near future. the Daniel's seventieth week will begin. Hebrews through most of Revelation is written for the upcoming age.
There are different dispensations revealed throughout the Bible, and in this age/dispensation/stewardship, grace is how God dispenses salvation. God initiates it, God sustains it, and God finishes it. Furthermore, if it was up to us, according to the Bible, we have no power to initiate it because He must draw us to Himself. We can't go on our own. We can't sustain it because no one is sinless even after God has saved them. And we can't finish it because the wages of sin is death, so we all deserve and have earned is death (the wages of sin is death). The Bible even stated that God is the author and finisher of our faith.
Salvation guarantees eternal life. It is not temporary. It is eternal.
Many forget that the things recorded in the Bible that Jesus said are things He said while He was living on this earth. He had not yet been crucified and resurrected. So while Jesus was still living, the law still applied. There was no grace, but God has always been merciful, and He gives mercy to whomever He chooses, whenever He so chooses.
I am also impressed that you correctly pointed out that it is the Lord that pick choses and draws US unto HIM and not the other way around as so many incorrectly uses the term that they "accepted Jesus Christ as their Lord and Saviour" when it actually doesn't work that way at all as you've pointed out that no one can come unto Christ accept the Father in heaven draws him/her. In your running down of the epistles written to the saints of the early church locations you left out tbe epistles by John, Jude, Peter and James.
As BLL uses the scriptures that he used to point out the error of the OSAS theology, you speak basically of another matter of the Lord's calling unto us and you are BOTH actually right in the points you are trying to establish.