I'm not denying that having assurance has pragmatic benefits. But, I don't believe things merely because they have pragmatic benefits; I believe things because they are true. And what I am asking you is how you now know for sure that it is true that at the Final Judgment you will be received into heaven. And I've studied your post #25, and I cannot find any explanation there of how you now know for sure that it is true that at the Final Judgment you will be received into heaven.
-A8
Well, I "thought" I had explained this in my 21. :) So, I'm not sure what you are looking for. I believe that the Bible is inerrantly true. The Bible is clear that those with true faith will be saved. It says that all of them will, not just "some" who have true faith. (As you know, the Bible distinguishes between those with true faith and those with false faith in places such as James 2:14.)
I claim to have true faith for a couple of reasons. One is that I know with what earnestness I prayed for Christ to come into my life. I compare that experience to what I have later learned through reading the prayers/testimonies of other Biblical figures, whom we all accept as true believers, and I am satisfied that my experience was real.
Another reason is that I have seen the effect my conversion has had on my life. I can testify that my thoughts and actions have changed and continue to change. I do and think things now that never would have occurred to me as an unbeliever. While I intellectually agree with everything in the Bible, even today there is much in the Bible that goes directly against what I want, that is, my sin nature. However, just as the Bible predicts, this list is getting smaller and smaller as I continue to be sanctified by the sole work of God. IOW, everything that has happened to me since my salvation is perfectly described in the Bible, including when I blow it. That tells me that I "look" like a saved Christian.
Now, you may well disagree with me about the interpretation of the passages I am referencing, but they are a basis of my assurance. Objectively, everything in the Bible about saved people "fits" so I am assured I am one of them. Subjectively, I testify to the presence of God actively working in my life to bring me closer to Him. He has put hunger in my heart to study His word when I am certain that it never would have been there were it left up to me. While God certainly uses the reprobate, I can't imagine He would do for me spiritually what He has already done, if His intention was to pull the rug out someday. In fact, the Bible promises that He won't. Therefore, from my perspective, if God did pull the rug out on me, then it would invalidate the Bible, an impossibility and another reason for assurance.