We will notice one more passage in the context, which may be urged as an objection. "Behold I show you a _mystery_; we shall not all sleep, but we shall all be changed in a moment, in the twinkling of an eye at the last trump; for the trumpet shall sound and the dead shall be raised incorruptible and we shall be changed." The _mystery_, here mentioned, refers to the change of those, who should be found alive at the coming of Christ in his kingdom, produced by the full revelation and establishment of that doctrine, which proclaims the immortal resurrection of all mankind _by being made alive in Christ_. It is the fulfillment of the following scriptures--Eph. i 9,10--"Having made known unto us the _mystery of his will_--that in the dispensation of the fullness of times he might gather together in one _all things in Christ_, both which are in heaven and which are on earth, even in him." This mystery was _then finished_ in the full revelation of his will to the doubting christians, whom Paul addresses in the context. This is evident from Rev. x:7--"But in the days of the voice of the _seventh angel_ when he _shall begin to sound_, the _mystery_ of God _should be finished_, as he hath declared to his servants the prophets." And that he began his reign when the mystery was finished is certain from Rev. xi. 15--And the seventh angel sounded; and there were great voices in heaven saying the kingdoms of this world are become the kingdoms of our Lord and his Christ, "and he shall reign forever and ever." Here we perceive that this _mystery of God's will_ was to be finished at the sound of the _seventh or last_ trump, which will is, to gather or make alive all things in Christ. And at this time he was to receive his kingdom and reign forever and ever. _"We shall not all sleep, but we shall all be changed,"_ has reference to those persecuted christians, who were not to "taste of death till they saw the Son of man coming in his kingdom."