Bede — on Rev 6:1 (Commentary on Revelation)

“And I saw when the Lamb had opened one of the seals. Since the signs are first loosened and then the book is opened, He wisely reversed the usual order. For the Lord, by suffering and rising again, taught that He is the end of the law. And ascending into heaven, sending the Holy Spirit, He strengthened the Church with the gift of a more secret mystery. Therefore, He opened the book then, and now He loosens its seals. In the first seal, the glory of the primitive Church; in the following three, the threefold war against her; in the fifth, the glory of those who triumphed in this war; in the sixth, those things that will come in the time of the Antichrist, with a brief recapitulation of the previous ones; in the seventh, he sees the beginning of eternal rest.”