Revelation 10:7 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.

(It would be easy to consider that this line is in the narrative, between what is said in line 6 and line 8.

However, it would appear that this may actually be a continuation of what the angel is swearing in line 6.

After he says, “that there should be time no longer”, it is immediately followed by a colon :  not a period . 

Which would mean that what follows in line 7, is a further clarification of what was said in line 6.

The world has experienced the terrible first 4 trumpets, the hideous fifth trumpet, and the ghastly & deadly sixth trumpet.

Before the fifth and sixth trumpet, they were warned by a flying angel, of three woes that were to come, and two did.

Now an angel comes down from heaven, who cries with a loud voice, and then there follows the voices of seven thunders.

Next, the angel swears by the creator, in direct contradiction to the blasphemy which they hold so dear, evolution.

Then, he throws down the gauntlet, by warning them, that it’s over for them, the time of their rebellion is coming to an end.

Now, here he mentions, “in the days of the voice of the seventh angel”, reminding them of the coming third woe.

This woe is about to come, and there appears to be a period of time before it happens.

This will allow some to repent, but others will rebel further, persecuting the LORD’s people, and amassing armies.)

Luke 17:26 And as it was in the days of Noe, so shall it be also in the days of the Son of man.

  8 Likewise also as it was in the days of Lot; they did eat, they drank, they bought, they sold, they planted, they builded;

Luke 21:22 For these be the days of vengeance, that all things which are written may be fulfilled.

(Then he says that when that seventh trumpet “shall begin to sound”, that, “the mystery of God should be finished”.)

Romans 16:25 Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,

I Corinthians 2:7 But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory:

Ephesians 3:9 And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:

Colossians 1:26 Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints:

(The mystery of God has remained a mystery to those who reject Jesus and his word, yet is manifest in his word, to us who believe.

Temporarily, Israel remains blind to this, until Jesus reveals himself to them.)

Romans 11:25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.

(We are to know, and to be stewards of, the mysteries:)

I Corinthians 4:1 Let a man so account of us, as of the ministers of Christ, and stewards of the mysteries of God.

(For example, the mystery of the body of Christ:)

Ephesians 5:32 This is a great mystery: but I speak concerning Christ and the church.

(The mystery of the incarnation and Deity of Jesus:)

I Timothy 3:16 And without controversy great is the mystery of godliness: God was manifest in the flesh,

(The mystery of the gospel:)

Ephesians 6:19 And for me, that utterance may be given unto me, that I may open my mouth boldly, to make known the mystery of the gospel,

(The mystery of the indwelling of God in the believer:)

Colossians 1:27 To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:

(The mystery of the Godhead:)

Colossians 2:2 That their hearts might be comforted, being knit together in love, and unto all riches of the full assurance of understanding, to the acknowledgement of the mystery of God, and of the Father, and of Christ;

(The mystery of the blessed hope, which will have already happened by this time:)

I Corinthians 15:51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,

(However, there are couple of mysteries that are only manifest during the tribulation: the antichrist and the whore of Babylon:)

Revelation 17:7 And the angel said unto me, Wherefore didst thou marvel? I will tell thee the mystery of the woman, and of the beast that carrieth her, which hath the seven heads and ten horns.

II Thessalonians 2:7 For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.

  8 And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:

  9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,

Revelation 17:5 And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.

(The world, in the tribulation, is finding out about these two mysteries, the hard way, the real hard way.

There is much more said about these two mysteries, a little further ahead, in this book.)

(So, the angel is announcing that the mystery of God should be finished at the sounding of the seventh trumpet.

This is another reason why it really looks like somehow the seventh seal, seventh trumpet, and seventh vial happen simultaneously.

That all three happen at the end of the tribulation, climaxing in the glorious second advent of King Jesus to the earth.

The angel adds, “as he hath declared to his servants the prophets”.

This further indicts, and perhaps provokes, the world that has absolutely rejected the word of God.

That word they rejected is being fulfilled before their very eyes, and the Word in flesh is about to to return in flaming vengeance.)