The Great Tribulation (Greek: θλίψις μεγάλη, thlipsis megalē) refers to tumultuous events that are described as "signs of the times", first mentioned by Jesus in the Olivet Discourse. It is also referenced in the Book of Revelation.
- For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
Then if any man shall say unto you, Lo, here is Christ, or there; believe it not. For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
Behold, I have told you before. Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not. For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be. For wheresoever the carcase is, there will the eagles be gathered together.
Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken: And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory. And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
- Has the Governing Body changed its mind about the closeness of the great tribulation? ... Not at all ... If the great tribulation interrupts our plans, that will be wonderful, absolutely wonderful!
- In response one of the elders said to me: “These who are dressed in the white robes, who are they and where did they come from?” So right away I said to him: “My lord, you are the one who knows.” And he said to me: “These are the ones who come out of the great tribulation, and they have washed their robes and made them white in the blood of the Lamb.
- Encyclopedic article on Great Tribulation at Wikipedia