The 1000 year Millenium

References to the Millenium

Satan is bound for 1000 years

Rev 20:4 - All resurrected believers reign with Christ for 1000 years.

Rev 20:5 - the rest of the dead didn't come to life until the thousand years were completed.

Rev 20:7 - when the thousand years are completed, Satan will be released from his prison.

Why interpret these passages literally?

There are some good reasons that these passages should be interpreted literally, and not symbolically.

The passages themselves don't give us any indication that they are symbolic.
The number 1000 is repeated many times, and no other symbolic term is ever used to indicate some long period of time.
If the Lord wanted us to know that it was a literal 1000 years, how else could He have indicated this to us? If after reading verse after verse very literally say that "such and such an event will be 1000 years, and then the next thing will happen, lasting 1000 years, and then at the end of the 1000 years so and so..." we still say it's symbolic, I would submit that it would be impossible for the Lord to have told us that it was literal without using the word "literal 1000 years", and this doesn't happen in the Bible.

Different Millennial views

Premillennialism - The view that endtimes.org holds, teaches that there will be a literal 1000 year reign of Jesus Christ on the earth, and that it will begin a number of days after the second coming of Christ, which happens at the end of the tribulation. (The rapture views are different within Premillennialism)
Postmillennialism - Teaches that the 1000 years is not a literal thousand years, but a long period of time, and that the world will be Christianized by the gospel, thus bringing in the kingdom, and then a long period of peace call the millennium will ensue, ending with the second coming of Christ, and heaven.
Amillennialism - Teaches that the millennium is symbolic, that we have already realized the millennium, and that we will go directly into eternity at the second coming. No literal 1000 year reign of Christ after the second coming. Current day Amillennialism teaches that Christ's present position at the right hand of God fulfills the OT promises of the kingdom.