Not much I can do for you. IMO you're importing language "true spiritual faith of the heart" into the Text. Everyone can believe. The issue is what they choose to believe and Who they choose to believe.
ESV John20:29-31 Jesus said to him, "Have you believed because you have seen me? Blessed are those who have not seen and yet have believed." 30 Now Jesus did many other signs in the presence of the disciples, which are not written in this book; 31 but these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in his name.
This entire document written by John of signs Jesus did was written so unbelieving men who have not seen Jesus could believe that Jesus is [YWHW''] Christ, the Son of God and thereby have eternal life.
Some will choose to believe and some will not. In the end of it all, it's really that simple.
Receiving "true spiritual faith of the heart" so a man can believe is made up and a myth.
Yeah, I'm done with this discussion too
[Luk 6:45 KJV] 45 A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil
: for of the abundance of the heart his mouth speaketh.
[Luk 8:15 KJV] 15 But that on the good ground are they,
which in an honest and good heart, having heard the word, keep [it], and bring forth fruit with patience.
[Rom 2:5 KJV] 5 But after thy
hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;
[Rom 5:5 KJV] 5 And hope maketh not ashamed; because
the love of God is shed abroad in our hearts by the Holy Ghost which is given unto us.
[Rom 2:29 KJV] 29 But he [is] a Jew, which is one inwardly;
and circumcision [is that] of the heart, in the spirit, [and] not in the letter; whose praise [is] not of men, but of God.
[Rom 10:8-10 KJV]
8 But what saith it?
The word is nigh thee, [even] in thy mouth,
and in thy heart: that is, the word of faith, which we preach;
9 That if thou shalt confess with thy mouth the Lord Jesus,
and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10
For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
[Heb 8:9-12 KJV]
9
Not according to the covenant that I made with their fathers in the day when I took them by the hand to lead them out of the land of Egypt; because they continued not in my covenant, and I regarded them not, saith the Lord.
10 For this [is]
the covenant that I will make with the house of Israel after those days, saith the Lord;
I will put my laws into their mind, ands
write them in their hearts: and
I will be to them a God, and they shall be to me a people:
[Heb 10:22 KJV] 22 Let us
draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water.
[Act 7:51 KJV] 51 Ye stiffnecked and
uncircumcised in heart and ears, ye do always resist the Holy Ghost: as your fathers [did], so [do] ye.
[Act 15:8-9 KJV]
8 And God, which knoweth the hearts, bare them witness,
giving them the Holy Ghost, even as [he did] unto us;
9 And put no difference between us and them,
purifying their hearts by faith.
[Mat 15:18 KJV] 18 But those things which proceed out of the mouth
come forth from the heart; and they defile the man.
[2Co 4:6 KJV] 6 For God, who commanded the light to shine out of darkness,
hath shined in our hearts, to [give] the light of the knowledge of the glory of God in the face of Jesus Christ.