What does the Bible say about a heart right with God?

In Acts 8, Peter informs Simon that his heart is not right with God, highlighting that true salvation is fundamentally a heart matter. Salvation requires a transformed heart—a mind, will, and affections changed by the grace of God. This transformation is depicted in Romans 10, which underscores that with the heart man believes unto righteousness, and with the mouth confession is made unto salvation. Thus, a heart right with God is characterized by a genuine faith in Jesus Christ and obedience to His commands.