Unlike us, there is nothing precarious about God’s existence. He has life in Himself and He is altogether perfect. He never changes, either for better or worse or to adapt to changing circumstances. So when a recent survey has shown that almost half of evangelicals in the US say ‘yes’ to the question, ‘Does God change?’ it raises questions about how solid someone’s faith is if they are not relying on the unchangeable God – and how lively their hope for the future can be. With our circumstances continually in flux and fears often threatening to overwhelm us, the comfort and hope that comes from the constancy of God cannot be underestimated. Faith in the unchanging and unchangeable God was what sustained one overwhelmed and fearful believer in Psalm 102.