How do we know that salvation is a heart work?

Salvation as a heart work emphasizes that true belief and commitment to Christ cannot arise from our natural inclinations. The Apostle Paul states in 2 Timothy 1:12 that he is confident in Christ's ability to keep what he has committed, pointing to a relationship built on divine assurance. This work of salvation is not merely about intellectual assent to doctrinal truths but involves a profound transformation of the heart. A heart transformed by God enables us to seek Him earnestly as expressed in Psalm 27:8, where the psalmist responds to God's call by saying, 'Thy face, Lord, will I seek.' Without this sovereign grace, we remain in a state of deceitfulness and wickedness (Jeremiah 17:9).