What does the Bible say about the great delusion?

The great delusion, as described in Scripture, is a profound spiritual blindness and deception that affects humanity. It is rooted in the sovereignty of God, where He is depicted as working all things, even evil, for His purposes (Isaiah 45:7). The delusion manifests particularly in those who reject the love of the truth, leading to their eternal damnation (2 Thessalonians 2:9-12). This blinding occurs not only in those outside the faith but also among professing Christians when they cling to works righteousness instead of grace.