How do we know the doctrine of sovereignty is true?

Sovereignty is a crucial doctrine in Reformed theology, affirming that God is in complete control of all creation and historical events. In 2 Thessalonians 2, we see that even the activities of the Antichrist are permitted within God's sovereign plan. As Paul explains, God sends a strong delusion to those who do not love the truth, allowing them to believe lies. This illustrates that nothing occurs outside of God's deliberate and purposeful will. Furthermore, biblical passages affirming God's sovereignty include Ephesians 1:11, which states that God works out everything in conformity with the purpose of His will. Thus, God's sovereignty is not only a theological concept but a foundational truth evident in the unfolding of redemptive history.