You know you have a new heart if you desire to love God and obey His commands, seeing the truth about yourself without relying on your own righteousness.
The evidence of having a new heart can be discerned through a change in desire and attitude toward God. In Hebrews 10:16, God promises, 'I will put my laws in their hearts, and in their minds will I write them.' This inward transformation is characterized by a genuine desire to know the truth and to live in accordance with God's will. Also, as noted in Romans 3:27, true believers recognize that salvation is not by works but through the law of faith, signifying a reliance on Christ and His righteousness. When believers find joy in God's truth, show love towards others, and understand their own sinful nature while relying solely on God's grace, they can be confident in their regeneration and identity as a man after God's own heart.
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