For I am the LORD, I change not; therefore ye sons of Jacob are not consumed. (Malachi 3:6) *1/ Who the LORD is - "I am the LORD" 2/ The attribute of the LORD that our attention is drawn to - "I change not" 3/ The mercy joined to this attribute - "Therefore ye sons of Jacob are not consumed."* **Sermon Summary:** The sermon explores the theological significance of God's immutability as revealed in Malachi 3:6, emphasizing that His unchanging nature provides stability and assurance to believers. It contrasts the fickleness of human behaviour with the consistent character of Jehovah, who remains faithful despite human sinfulness. The preacher explains that this attribute is not merely abstract but serves as the foundation for the certainty of salvation and the reliability of God's promises. By examining the person and work of Jesus Christ, the text highlights how divine constancy ensures that the elect are preserved from destruction through Christ's atoning sacrifice. Ultimately, the message offers pastoral comfort, urging listeners to rest their hope on a God whose word and love never fail.