When the thousand years are complete, Satan will be released from his prison,
Christ Himself is the Angel who binds Satan with chain and key, for none but He has power over the strong man armed. The dragon's strength and subtlety cannot save him from Christ's hands; cast down to his prison with just vengeance, he is shut up and stripped of his old liberty to disturb the churches and deceive the nations.
AI summary
Commenting on Revelation 20:1-10
And when the thousand years are expired,.... Which are not yet expired; not in the year 1000, or 1033 or 4, reckoning from the birth or death of Christ, when Paganism, which had been destroyed in the Gentile world, was introduced into the church, which bore the Christian name, through the man of sin; for this had been bringing in by degrees more or less...
Verse 7. And when the thousand years are expired. See . Satan shall be loosed out of his prison. See . That is, a state of things will then occur as if Satan should be for a time let loose again, and should be permitted to go as formerly over the world no intimation is given why or how he would be thus released from his prison.