Your ideas match perfectly with what is taught in Rome. Do you really think that those whom the LORD has "perfected forever" can ever lose their salvation? Or perhaps you have been persuaded by some on this forum who say that "forever" can end?
In regard to "Once Saved Always Saved" the Christian is told that they already possess eternal life in the Son (1 Jn.5:11). And here is what the Lord Jesus said about those to whom he gives eternal life:
"And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand" (Jn.10:28).
We also know that eternal life is a gift from the Lord (Ro.6:23) and we also know that once He gives the gift of eternal life He will not take it back:
"for God’s gifts and his call are irrevocable" (Ro.11:29).
...
Of course I never expected you to address these facts!
Eternal life is a gift from God, and it is not actually received until we are made perfect. That being made perfect is not yesterday, it is not today, it is at the resurrection of the dead, which you ought to know if you were to ever read Paul's summary of the gospel.
1Co 15:1 KJV
(1) Moreover, brethren, I declare unto you the
gospel which I preached unto you, which also ye have received, and wherein ye stand;
1Co 15:50-55 KJV
(50) Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.
(51) Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
(52) In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
(53) For this corruptible must put on incorruption, and this mortal must put on immortality.
(54)
So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
(55) O death, where is thy sting? O grave, where is thy victory?
Heb 11:35, 40 KJV
(35) Women received their dead raised to life again: and others were tortured, not accepting deliverance;
that they might obtain a better resurrection:
(40)
God having provided some better thing for us, that they without us should not be made perfect.
And before you start that "exclusively for the JEWS" nonsense, I will remind you that the word "us" includes the writer. That being made perfect is immortality and eternal life, which Paul in the gospel instructs is an event at a future time. If you think that you have God over a barrel and locked in and that you currently are immortal then you are sadly deluded and potentially in very grave danger as you ignore the warnings of Christ.
Luk 8:13-15 KJV
(13) They on the rock are they, which, when they hear, receive the word with joy;
and these have no root, which for a while believe, and in time of temptation fall away.
(14) And that which fell among thorns are they, which, when they have heard, go forth, and are choked with cares and riches and pleasures of this life,
and bring no fruit to perfection.
(15) But that on the good ground are they, which in an honest and good heart, having heard the word, keep it,
and bring forth fruit with patience.
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Rom 11:29 KJV
(29) For the gifts and calling of God are
without repentance.
And incidentally, your use of Romans 11:29 is misleading. The calling of God he is speaking of is the grafting in of the Gentiles with the Israelite, not being applied to a
specific individual(s). The Gentile branch that has been grafted shall not be ungrafted: read the context! Can elsewhere says he can and will revoke mercies and salvation unto individuals who bear no fruit.
Mat 18:32-35 KJV
(32) Then his lord, after that he had called him, said unto him,
O thou wicked servant, I forgave thee all that debt, because thou desiredst me:
(33) Shouldest not thou also have had compassion on thy fellowservant, even as I had pity on thee?
(34) And his lord was wroth, and delivered him to the tormentors, till he should pay all that was due unto him.
(35)
So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.
Rev 2:4-5 KJV
(4) Nevertheless I have somewhat against thee, because thou hast left thy first love.
(5)
Remember therefore from whence thou art fallen, and repent, and do the first works; or else I will come unto thee quickly,
and will remove thy candlestick out of his place, except thou repent.
Even the Calvinists on this board will admit that we should heed these warnings as being real.