It's not the people who are elect it's the plan. Read it again God has predestined that those who get saved will be conformed to the image of His Son. When the elect are mentioned it's a group that you join of free will that is Holy. Elect pretty much means you're set aside. But the plan of salvation and transformation were chosen by God the Father. I thank God for free will salvation because they would any God put people in hell that he never offered salvation if he let some be saved from sin. Seek out your own salvation with fear and trembling.
Where was Adam's bride, Eve, hidden before she was revealed?
She was in Adam’s side!
And, where are we (his bride) now hidden?
IN HIM! Chosen in Him!
And raised us up together, and made us sit together in the heavenly places in Christ Jesus,
in order that in the coming ages he might show the incomparable riches of his grace,
expressed in his kindness to us in Christ Jesus." Ephesians 2:6-7
For, we are destined to be declared to be what?
"Bone of His bones, and glorious flesh of His glorious body!
We (the Church) have been chosen before the foundations of the world, to become as He is in His glorious body!
Keep in mind!
Moses and Isaiah were not chosen and predestined for such a glorious blessing!