4 Then I saw thrones, and seated on them were those to whom judgment was committed. Also I saw the souls of those who had been beheaded for their testimony to Jesus and for the word of God, and who had not worshiped the beast or its image and had not received its mark on their foreheads or their hands. They came to life, and reigned with Christ a thousand years. 5 The rest of the dead did not come to life until the thousand years were ended. This is the first resurrection. 6 Blessed and holy is he who shares in the first resurrection! Over such the second death has no power, but they shall be priests of God and of Christ, and they shall reign with him a thousand years.
Matthew Henry's Commentary on Revelation 20:4-6
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.