Ezekiel 36:25-27: "I will cleanse you from all your impurities and from all your idols. I will give you a new heart and put a new spirit __in__ you; I will remove from you your heart of stone and give you a heart of flesh. And I will put my Spirit __in__ you and move you to follow my decrees..."
Similar sentiments are found elsewhere in Jewish literature. Here is another passage from the Qumran material (1QS 4:19-21):
He will cleanse him of all wicked deeds by means of a holy spirit; like purifying waters He will sprinkle upon him the spirit of truth.
NT:
Matthew - Chapter 8: 21-22
Another of the disciples said to him, "Lord, let me first go and bury my father."
And Jesus said to him, "Follow me, and leave the dead to bury their own dead."
Spiritual death is when a person is alive physically, but dead spiritually.
[But] you He made alive, who were dead in trespasses and sins in which you once lived, following the course of this world, following the ruler of the power of the air, the spirit that is now at work among those who are disobedient. All of us once lived among them in the passions of our flesh, following the desires of flesh and senses, and we were by nature children of wrath, like everyone else (Ephesians 2:1-3).
The wayward son was said to have been spiritually dead. "But we had to celebrate and be glad, because this brother of yours was dead and is alive again; he was lost and is found (Luke 15:32).
I think you missed the part "theology for Jew who believed in the Torah." Eze is not the Torah.