This sixth verse is almost a duplicate of the first verse of the book, showing that we are looking at the whole revelation from the outlook of the starting point, — a fit method of conclusion. Both state that this book is a revelation from God, communicated by his angel "to show unto his servants the things that must shortly be done." That was the prologue, it is also the conclusion, and it brings us back to the historical setting. John was writing these things to the churches of Asia with particular reference to their condition of suffering and jeopardy. In the beginning and the end he tells them that these things must shortly come to pass. The events predicted in this book were just beginning to break upon the church of that day, hence they were things that "must shortly be done."