"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 !" Revelation 10:7 and I Timothy 3:16*

This video is from "The Mystery Revealed" series, available at the link below.
   • The Mystery Revealed  The Loud Cry a...  

"Several have written to me, inquiring if the message of justification* by faith is the third angel's message, and I have answered . . . "It is the third angel's message in verity."

The prophet declares, "And after these things I saw another angel come down from heaven, having great power; and the earth was lightened with his glory." Revelation 18:1

Brightness, glory, and power are to be connected with the third angel's message, and conviction will follow wherever it is preached in demonstration of the Spirit.
How will any of our brethren know when this light shall come to the people of God? As yet, we certainly have not seen the light that answers to this description . . . !" Review & Herald, April 1, 1890