Augustine of Hippo
The Lord Jesus Christ Himself says: "No one can enter a strong man's house and plunder his goods, unless he first binds the strong man; then he will plunder his house" (Mk 3:27). By the name of the strong man He means the devil, because the devil was able to hold the human race in captivity. By his goods, which He was to plunder, He means His future faithful, whom the devil held in various sins and impieties. Since that strong man was to be bound, the aforementioned Apostle saw in Revelation an angel descending from heaven, who had the key of the abyss and a great chain in his hand. He seized the dragon, that ancient serpent, who is the devil and Satan, and bound him for a thousand years.
Read more (319 words)
That is, he removed and restricted his power to deceive and to hold in his hands those who awaited liberation. The thousand years, as it seems to me, may be understood in two ways. Either this is accomplished during the remaining years of the millennium, that is, in the sixth millennium, as on the sixth day. Its last hours are now passing, and afterward will follow the Sabbath without evening, that is, the endless rest of the saints. In this case the Apostle called the final part of the millennium remaining until the end of the age a thousand years, as a part of the day is named by the whole. Or else by the thousand years he named all the remaining years of this age, so that the fullness of time is signified by a perfect number. For the number one thousand is the complete cube of the number ten. Ten taken ten times gives one hundred. A square figure results, but it is flat. In order for it to receive height and become complete, one hundred is multiplied again by ten, and one thousand results. Sometimes even one hundred is used to signify the whole totality of something. This occurs when the Lord gives a promise to the one who has left all and followed Him, saying: "He will receive a hundredfold" (Mt 19:29; Mk 10:30). As though explaining this, the Apostle says: "We have nothing, and yet possess all things" (2 Cor 6:10). For it had already been said before: "For the faithful, the whole world is riches" (Prov 17:6). Much more is one thousand used to signify the totality of all things, since it represents the fullness of the decimal square. No better interpretation can be given to the expression read in the psalm: "He remembers His covenant forever, the word that He commanded for a thousand generations" (Ps 104:8), that is, for all generations.