How does one create a clean heart according to the Bible?

To create a clean heart, one must first recognize their sinful nature and seek God’s mercy. As expressed in Psalm 51:10, 'Create in me a clean heart, O God; and renew a right spirit within me,' this plea is rooted in a deep awareness of one's sinfulness and the desire for spiritual renewal. This process requires genuine repentance—a turning away from sin and towards God, coupled with faith in Jesus Christ, who offers forgiveness and cleansing. It is through the Holy Spirit's work that believers are transformed, assured that if they confess their sins, He is faithful and just to forgive them and cleanse them from all unrighteousness (1 John 1:9).