How do we know God does not change?

Malachi 3:6 explicitly declares God's unchanging nature with the statement, 'I am the Lord, I change not.' This foundational truth is echoed throughout Scripture, emphasizing that God’s character remains constant. His faithfulness ensures that His Word and promises are reliable, providing believers with a source of hope and security. As believers, recognizing that God is immutable allows us to rest assured in His plans and purposes, knowing they will come to fruition without alteration.