How do we know God is immutable?

God's immutability is a central tenet of sovereign grace theology, reinforced in Hebrews 6:17, which states that God desires to show the heirs of promise the immutability of His counsel. This is a significant comfort for believers because it underscores that God's promises are reliable and will not change. Malachi 3:6 echoes this certainty, stating, 'For I am the Lord, I change not.' This unchangeability means that God is always faithful to His people, allowing us to have strong consolation amidst life's uncertainties, knowing that His grace and favor do not waver.