"For who maketh thee to differ from another? and what hast thou that thou didst not receive?" -- 1 Corinthians 4:7"A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh." -- Ezekiel 36:26
Claim your heart as your own if you so desire, Kosta. As for me, I thank God every day for His free, merciful, unearned gift of a new heart of flesh with which to love Him and know my salvation is by and through and for Christ alone.
Your random verse generator is amazingly cherry-picking. You quote everyone but the Lord (!). Consider "Blessed are the pure in heart, for they will see God." Or "But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart." Or "For where your treasure is, there your heart will be also." Or "Take my yoke upon you and learn from me, for I am gentle and humble in heart, and you will find rest for your souls."
The Lord also says "For this people's heart has become calloused; they hardly hear with their ears, and they have closed their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts and turn, and I would heal them."
The heart is not dead, but sick, and he will heal it. God already insctibed His laws in everyone's hearts, but, as Jesus says, these hearts have "become calloused." But you will believe Ezekiel and Paul more than Christ Himself.
And the Lord also says "When anyone hears the message about the kingdom and does not understand it, the evil one comes and snatches away what was sown in his heart. This is the seed sown along the path."
And even those with "new" hearts continue to sin, for "[T]he things that come out of the mouth come from the heart, and these make a man 'unclean.' For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false testimony, slander. These are what make a man 'unclean'; but eating with unwashed hands does not make him 'unclean.'"
And "for they had not understood about the loaves; their hearts were hardened." Does that mean they had "new hearts" and then fell again, or was it their "original" heart that became "soft" only to be beocme "hard" again? And what does that say abotu certainty of salvation?
Our Lord Jesus Christ speaks of hardened hearts and not of new hearts. Ezekiel and Paul do. Does your random verse generator not have our Lord's words in its reportoire?
Apparently it's because the Apostoles, being Jews, believed that some men are good and others are not (imagine that!). "The good man brings good things out of the good stored up in his heart, and the evil man brings evil things out of the evil stored up in his heart. For out of the overflow of his heart his mouth speaks."
But you will only quote Paul who says that no one is good. I gues if he says so, it must be true. All other Apostles must be wrong!
And then in Hebrews 3:12 "See to it, brothers, that none of you has a sinful, unbelieving heart that turns away from the living God."
Who decides here if they are "to see to it?"
In Heb 4:7 it seems to me that we have a CHOICE! "Today, if you hear his voice, do not harden your hearts." Imagine that. We can alos harden our hearts!
In 1 Pet 3:5 it says "But in your hearts set apart Christ as Lord." If your "new heart" goes to Christ all by itself and is not yours to decide, how can we set Christ apart in our hearts?
In 1 John 3:18-20 it says "Dear children, let us not love with words or tongue but with actions and in truth. This then is how we know that we belong to the truth, and how we set our hearts at rest in his presence whenever our hearts condemn us. For God is greater than our hearts, and he knows everything.
In other words, do not preach. Live the life of Christ as much as possible. And remember that it is you who sets your heart because it is yours. It may be given to you by the the Lord Holy Spirit, as all blessings are, but what we do with it is our decision and our will, and it may be used for good, in God' name or it may be use for sin and our condmenation.