Rev.20: Then I saw an angel coming down from heaven, having the key to the bottomless pit and a great chain in his hand.
2 He laid hold of the dragon, that serpent of old, who is the Devil and Satan, and bound him for a thousand years;
3 and he cast him into the bottomless pit, and shut him up, and set a seal on him, so that he should deceive the nations no more till the thousand years were finished. But after these things he must be released for a little while.
There is actually false teaching that we are living in the millennial reign of Christ currently. How so? Such deception? The word tells that satan will be bound with this great chain for 1000 yrs. That is a long time. And if he is causing this much havoc bound, he has been given some long chains. So, why release him? Many being born thru & during this time has never been put thru the testings. How can you have a ligitamite stand for Jesus if you never had to choose? There are many generations in a 1000 yr time.