What does the Bible say about God's purpose being immutable?

In Psalm 33:11, we see that the counsel of the Lord stands forever, indicating that His immutable purpose cannot change. This concept is foundational to understanding God's sovereignty and the assurance of salvation in His plan. God's thoughts and counsel are not subject to the whims of humanity; they are eternally established and executed by His power. This immutability assures believers that their salvation, predetermined before the foundation of the world, cannot be altered or thwarted by human actions or decisions.