“After this I looked, and, behold, a door was opened in heaven: and the first voice which I heard was as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter .”
Hereafter followeth the second part of this book, altogether prophetical, foretelling those things which were to come, as was said before, Rev. 1:19 . This is divided into two histories: one common unto the whole world, unto Chapter 9: and another singular of the Church of God, thence unto chapter 22 . And these histories are said to be described in several books, Rev. 5:1 and 10:2. Now this verse is as it were a passage from the former part unto this second: where it is said, that the heaven was opened, that is, that heavenly things were unlocked, and that a voice as of a trumpet sounded in heaven to stir up the Apostle, and call him to the understanding of things to come. The first history hath two parts: one the causes of things done, and of this whole Revelation, in that and the next chapter. Another of the acts done, in the next 4 chapters. The principal causes according to the distinction of persons in the vanity of divine essence, and according to the economy or dispensation thereof, are two. One the beginning, which none can approach unto, that is, God the Father, of whom is spoken in this chapter. The other, the Son, who is the mean cause, easy to be approached unto us, in respect that he is God and man in one person: of whom, Rev. 5 .