Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
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
Blessed and holy is he that hath part in the first resurrection,.... This may be considered either as descriptive of the persons that shall partake of this privilege; as that they are only such who are blessed with spiritual blessings, with a justifying righteousness, with pardon of sin, and regenerating grace, and who are sanctified by the Spirit of God; these, and these only, will...
Verse 6. Blessed. That is, his condition is to be regarded as a happy or a favoured one. This is designed apparently to support and encourage those who in the time of John suffered persecution, or who might suffer persecution afterwards. And holy. That is, no one will be thus honoured who has not an established character for holiness.