How do we know God's sovereignty over the devil is true?

The sovereignty of God over the devil is a central theme in Scripture. Romans 8:28 illustrates that all things, including the actions of the devil, work together for good for those who love God. The devil is portrayed as 'God's devil,' meaning he has a role within God's ultimate plan. For example, in Job 1:6-12, Satan comes before God seeking permission to test Job, which shows that even the devil operates under God's authority and cannot act without His consent. This reinforces that God is in control of all events, including those involving evil forces.