But when you do obey God is the cause correct?
What is the point of the new heart?
Here is the Biblical answer to your question thats in direct opposition to your beliefs. I'm so glad you asked the question and there is no mystery or secret will in the obvious answer from Jesus and the Apostles/Prophets. Gods will and answers are clear for all to understand below.
Ezekiel 18:30-32
“Therefore, you Israelites, I will judge each of you according to your own ways, declares the Sovereign LORD. Repent! Turn away from all your offenses; then sin will not be your downfall. Rid yourselves of all the offenses you have committed, and get a new heart and a new spirit. Why will you die, people of Israel? For I take no pleasure in the death of anyone, declares the Sovereign LORD. Repent and live!
Notice what comes first
1- Repent , turn away from sin
2- the after you repent you get a new heart/spirit ( calvinism- regeneration, new life)
3- repent then you live, have life- ie new heart, spirit.
John has the same order in in his opening of the gospel and in his purpose statement for writing his gospel.
John 1:12-13
“Yet to all who did
receive him, to those
who believed in his name, he gave the right to become children of God— children born not of natural descent, nor of human decision or a husband’s will, but born of God.
Same order as above receive, believe, call on Him then the new birth follows.
John 20:31
“But these are written that you may believe that Jesus is the Christ, the Son of God, and that
by believing you may have life in his name.
Once again the order is consistent with the OT- belief/repentance precedes life.
Romans 10:8-13
But what does it say? “The word is near you; it is in your mouth and in your heart,” that is, the message concerning faith that we proclaim: 9 If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved. 10 For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved. 11 As Scripture says, “Anyone who believes in him will never be put to shame.” 12 For there is no difference between Jew and Gentile—the same Lord is Lord of all and richly blesses all who call on him, 13 for, “Everyone who calls on the name of the Lord will be saved.”
Again above we see its hearing the gospel, believing the message , confessing then calling upon the Lord results in salvation.
Acts tells us the same order in 11:18- "So then, God has granted even the Gentiles repentance unto life.” Repent precedes life.
Paul confirms the order in Ephesians below as well. Hearing and believing precedes the Holy Spirit that we were sealed with not before belief.
Ephesians 1:13
we are not in Christ until we believe- Eph 1:13
12 in order that we,
who were the first to put our hope in Christ, might be for the praise of his glory. 13 And you also were included
in Christ when you heard the message of truth, the gospel of your salvation.
When you believed, you were marked
in him with a seal, the promised Holy Spirit, 14 who is a deposit guaranteeing our inheritance until the redemption of those who are God’s possession—to the praise of his glory.
notice the biblical order once again.
1- When you heard the gospel
2- When you believed ( the gospel )
3- After which you became in Christ, in Him
4- After hearing/believing came the indwelling Holy Spirit
5- Salvation is the result of the above and are now Gods possession.
James and Peter have the same exact order in James 1:18 , 1 Peter 1:23.
See how scripture is consistent when you do not read your doctrine into it but read it objectively, without bias ?
conclusion: as we read in these SALVIFIC passages there is a consistent order.
1- hearing the word, the gospel
2- believing the gospel
3- receiving the gospel
4- calling upon the Lord
5- confessing Jesus is Lord
6- resulting in the new birth, born of God, regeneration, salvation, eternal life
hope this helps !!!