And round about the throne were four and twenty thrones: and upon the thrones I saw four and twenty elders sitting, clothed in white clothing; and they had on their heads crowns of gold.
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seats: The same Church which because of its fellowship in faith he had seen on one throne, he beholds, as sprung by a twofold testament from patriarchs and Apostles, on twenty-four seats, and it is seated because of its judicial dignity in Christ. So all the members will sit and judge, but in one and by one Head. For how will saints be able to sit in the judgement, while they are standing at the right hand of the Judge? The twenty-four elders may also be understood of those who, by their loud preaching of the gospel, complete the perfection of work, which is represented in the number six; for four times six make twenty-four. ...
About the throne were four and twenty seats, or lesser thrones, with twenty-four seniors or senators upon them, representing the illustrious saints both of the Old and New Testament, clothed in white garments, in token of their innocence, and crowns of gold, signifying the glory of the heavenly inhabitants. (Witham)
These four and twenty elders sitting round the throne of God, represent the judgment which the Almighty was about to pass upon the enemies of his Church. Thus in Daniel, when he was about to pronounce sentence against Antiochus Epiphanes, "thrones were placed, and the ancient of days sat. The judgment sat, and the books were opened. "(Daniel vii. 9, 10.) They represent kings and priests who attend on the Sovereign Judge. It appears as if God intended to designate by the number the ancient patriarchs and the twelve apostles, who judge with the Lord, and condemn the injustice of their persecutors. (Calmet) ...
Therefore, doubtless, there are appointed also twelve angels of the day and twelve angels of the night, in accordance, to wit, with the number of hours. For these are the twenty-four witnesses of the days and nights