Passage
Therefore reioyce, ye heauens, and ye that dwell in them. Wo to the inhabitants of the earth, and of the sea: for the deuill is come downe vnto you, which hath great wrath, knowing that he hath but a short time.
Therefore reioyce, ye heauens, and ye that dwell in them. Wo to the inhabitants of the earth, and of the sea: for the deuill is come downe vnto you, which hath great wrath, knowing that he hath but a short time.
Revelation 12:10 Then I heard a loude voyce in heauen, saying, Now is saluation, and strength, and the kingdome of our God, and the power of his Christ: for the accuser of our brethren is cast downe, which accused them before our God day and night.
Revelation 12:11 But they ouercame him by that blood of that Lambe, and by that worde of their testimonie, and they loued not their liues vnto the death.
Revelation 12:12 Therefore reioyce, ye heauens, and ye that dwell in them. Wo to the inhabitants of the earth, and of the sea: for the deuill is come downe vnto you, which hath great wrath, knowing that he hath but a short time.
Revelation 12:13 And when the dragon sawe that hee was cast vnto the earth, he persecuted the woman which had brought forth the man childe.
Revelation 12:14 But to the woman were giuen two wings of a great eagle, that she might flie into the wildernes, into her place, where she is nourished for a time, and times, and halfe a time, from the presence of the serpent.
The verse centers on "therefore", "reioyce", "heauens", "dwell", "inhabitants", "earth", "deuill", and "come". It is saying that the verse draws attention to "therefore" and "reioyce", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "But they ouercame him by that blood..." into verse 13's "And when the dragon sawe that hee...", so "therefore" and "reioyce" belong inside that flow. In Revelation context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "therefore" and "reioyce" with trust shaped by these words, not by a vague optimism outside the passage.