How do we know God's purpose is unchangeable?

The unchangeability of God's purpose is a fundamental aspect of sovereign grace theology. In Isaiah 46:10, the Lord declares, 'My counsel shall stand, and I will do all my pleasure.' This assures us that nothing can thwart God's eternal intentions. This characteristic of God reassures believers that all unfolding events, even those that seem chaotic or contrary, are ultimately under His sovereign authority and are being directed toward His final predestined end. God's eternal purpose is secure, reflecting His immutability as outlined in Scripture.