201 Then I saw an angel coming down from heaven with the key to the bottomless pit and a heavy chain in his hand. 2 He seized the dragon-that old serpent, who is the devil, Satan-and bound him in chains for a thousand years. 3 The angel threw him into the bottomless pit, which he then shut and locked so Satan could not deceive the nations anymore until the thousand years were finished. Afterward he must be released for a little while. 4 Then I saw thrones, and the people sitting on them had been given the authority to judge. And I saw the souls of those who had been beheaded for their testimony about Jesus and for proclaiming the word of God. They had not worshiped the beast or his statue, nor accepted his mark on their foreheads or their hands. They all came to life again, and they reigned with Christ for a thousand years. 5 This is the first resurrection. (The rest of the dead did not come back to life until the thousand years had ended.) 6 Blessed and holy are those who share in the first resurrection. For them the second death holds no power, but they will be priests of God and of Christ and will reign with him a thousand years.
Matthew Henry's Commentary on Revelation 20:1-6
Commentary on Revelation 20:1-3
(Read Revelation 20:1-3)
Here is a vision, showing by a figure the restraints laid on Satan himself. Christ, with Almighty power, will keep the devil from deceiving mankind as he has hitherto done. He never wants power and instruments to break the power of Satan. Christ shuts by his power, and seals by his authority. The church shall have a time of peace and prosperity, but all her trials are not yet over.
Commentary on Revelation 20:4-6
(Read Revelation 20:4-6)
Here is an account of the reign of the saints, for the same space of time as Satan is bound. Those who suffer with Christ, shall reign with him in his spiritual and heavenly kingdom, in conformity to him in his wisdom, righteousness, and holiness: this is called the first resurrection, with which none but those who serve Christ, and suffer for him, shall be favoured. The happiness of these servants of God is declared. None can be blessed but those that are holy; and all that are holy shall be blessed. We know something thing of what the first death is, and it is very awful; but we know not what this second death is. It must be much more dreadful; it is the death of the soul, eternal separation from God. May we never know what it is: those who have been made partakers of a spiritual resurrection, are saved from the power of the second death. We may expect that a thousand years will follow the destruction of the antichristian, idolatrous, persecuting powers, during which pure Christianity, in doctrine, worship, and holiness, will be made known over all the earth. By the all-powerful working of the Holy Spirit, fallen man will be new-created; and faith and holiness will as certainly prevail, as unbelief and unholiness now do. We may easily perceive what a variety of dreadful pains, diseases, and other calamities would cease, if all men were true and consistent Christians. All the evils of public and private contests would be ended, and happiness of every kind largely increased. Every man would try to lighten suffering, instead of adding to the sorrows around him. It is our duty to pray for the promised glorious days, and to do every thing in our public and private stations which can prepare for them.