Revelation 20:1-3 describes the defeat of Satan by Jesus.
And I saw an angel coming down out of heaven, having the key to the Abyss and holding in his hand a great chain. He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years. He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations any more until the thousand years were ended.
A chain is a symbol of restraining power. It stands for the real, sovereign and restraining power of Jesus. Up until the time of the cross, Satan was able to dominate the nations of the earth, but he was defeated by the death of Jesus.
He has no authority in heaven, and can only work by deception. He still works, but he is limited in the area of his activity. He is controlled by God, and cannot dominate the nations as he did previously. In the Old Testament, all the nations except Israel loved in darkness. Satan will never be able to exercise that kind of power again.
This is not a description of some future event. The Bible teaches very clearly that we do not have to wait for Satan to be bound in the future. He was defeated by Jesus' victory on the cross. Jesus disarmed Satan and all his powers, by making a public spectacle of them, when he triumphed on the cross (Col 2:15). He has already done everything that needs to be done to secure Satan's downfall.
The impotence of Satan is clearly demonstrated in Job 1,2. Before Satan could touch anything belonging to Job, he had to get permission from the Lord. He has no power over a righteous man, but the unrighteous are in his power.
Because Job was one of the few righteous men in the Old Testament world, Satan could exercise considerable power. In this age, all Christians have been made righteous by the blood of Jesus. Satan cannot touch them unless he gets permission from the Lord.
He is an instrument that God used to fulfil his purposes. Satan only has power over those who reject the salvation of Jesus. Once the majority of people are converted, Satan's power will be gone. He has been bound by Jesus.
The reason Satan still seems to be so active is that the church has failed to realise the full extent of what Christ has achieved. In binding Satan, Jesus works through the church. He has placed the chain that binds Satan in the hands of his people.
They must restrain Satan's power over the nations. Jesus won a judicial victory on the cross. When a decision is made in a court of law, it does not become a fact until the police enforce it. The church has the police power to enforce Jesus judicial victory. Satan will not be fully bound until the church forces him to recognise the sentence that was passed against him at the cross.
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Satan is bound through the proclamation of the gospel. When the seventy disciples returned from their successful preaching mission, Jesus said,
I saw Satan fall like lightning from heaven. I have given you authority to trample on snakes and scorpions, and to overcome all the power of the enemy (Luke 10:18,19).
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The Binding of Satan
Oh dear what silly nonsense!