How do we know purity of heart is true?

We know purity of heart is true as it is evident in the lives of those who have experienced God's grace. God's Word teaches that purity cannot be achieved through human effort; rather, it is a product of divine intervention. As it is expressed in Ezekiel 36:26, God promises to give His people a new heart and a new spirit, indicating that the transformation is actively performed by Him, thus bringing about spiritual renewal. The presence of a pure heart is evidenced by a sincere desire to serve God wholeheartedly, hearing His Word, and reflecting integrity and honesty in all aspects of life.