One obeys from the Heart because they were already Justified by the death of Christ. Obedience is the fruit of Justification not the cause. When Christ died in 33 ad everyone one He died for died with Him, they also rose with Him Justified Rom 4:25
25 Who was delivered for our offences, and was raised again for our justification.
I did not rise with Him justified in 28 or 33 AD. I can't remember ever having seen a text that says that. It didn't happen then. Jesus was not literally slain before the foundation of the earth.
Romans 6
Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? 4 Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life.
5 For if we have been united together in the likeness of His death, certainly we also
shall be in the likeness of
His resurrection, 6 knowing this, that our old man
was crucified with
Him, that the body of sin might be [
a]done away with, that we should no longer be slaves of sin. 7 For he who has died has been [
b]freed from sin. 8 Now if we died with Christ, we believe that we
shall also live with Him, 9 knowing that Christ, having been raised from the dead, dies no more. Death no longer has dominion over Him.
For whom He foreknew, He also predestined
to be conformed to the image of His Son, that He might be the firstborn among many brethren.
First to be born from the dead. The rest comes after Him.
1 Corinthians 15
But now Christ is risen from the dead,
and has become the firstfruits of those who have [
d]fallen asleep. 21 For since by man
came death, by Man also
came the resurrection of the dead. 22 For as in Adam all die, even so in Christ all shall be made alive. 23 But each one in his own order: Christ the firstfruits, afterward those
who are Christ’s at His coming. 24 Then
comes the end, when He delivers the kingdom to God the Father, when He puts an end to all rule and all authority and power.
But this is about getting a new body. You get a new spirit when you repent.
Romans 8
He condemned sin in the flesh, 4 that the righteous requirement of the law might be fulfilled in us who do not walk according to the flesh but according to the Spirit.
9 But you are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you.
Now if anyone does not have the Spirit of Christ, he is not His. 10 And
if Christ
is in you, the body
is dead because of sin, but the Spirit
is life because of righteousness.
So before I got saved I was not His yet and I hadn't gotten a new spirit yet and although I died with Christ 2000 years ago, it wasn't in effect before I got saved. I was the old man.
The last Adam
became a life-giving spirit.
He could only give me life when I asked Him to come into my life and forgive my sins. Not before that. If it all happened instantly for the elect, the elect would have been born holy with an immortal body.