What does the Bible say about Satan's power during the gospel age?

According to Revelation 20, during the gospel age, which spans from Christ's first coming to His final judgment, Satan is described as being bound. This means he has limited power and can only act within the constraints God has set for him. The preacher illustrates this by comparing Satan to a vicious dog on a chain, indicating that while he poses a threat, his actions are ultimately controlled by God's sovereign will. Biblical references such as Job's experiences demonstrate that even in his opposition, Satan must seek permission from God before he can act.