Amen
We will never know even in the light of glory
Nor should we attempt to know
Nor should we invest man with the free will to chose or not chose salvation in order to answer the question - it does not
Nor does it get God off the hook when He is measured according to our standard of fairness. The attributes of God include the three omni's; so if we search for an answer to what seems to us the unfairness of God in choosing some & not others (Rom 9 always comes to mind) we hit another insurmountable barrier.
God is the Righteous One
Mans only righteous is by For we through the Spirit wait for the hope of righteousness by faith Galatians 5:5 (King James Version)
The only answer is trust Him through faith and do not ask
" The only answer is trust Him through faith and do not ask"
I don't doubt that you believe the first part of this. Would you really insist on the second?