Matthew 24:9 Then they will deliver you to tribulation and kill you, and you will be hated by all nations of the Gentiles because of my name.
Matthew 24:21-22 For then there will be great tribulation, such as has not occurred since the beginning of the world until now, nor ever will. 22 And if those days were not cut short, no flesh would be saved; but for the sake of the elect those days shall be cut short.
Revelation 7:13-14 And one of the elders took the floor and said to me, "Who are these who are clothed in white garments, and where did they come from? 14 And I said to him, Lord, you know. And he said unto me, These are they which come out of the great tribulation;
Revelation 13:7 And it was given to him to make war with the saints and to overcome them;
CONCLUSION: Even the redeemed will experience part of the tribulation, they will be exposed to the tribulation, killed for Jesus' name's sake (Matthew 24:9), the days must be "shortened" for them, because otherwise no one would be saved (Matthew 24:21-22). At the time of their salvation, they will "come out of the great tribulation" (Rev. 7:13-14), and the "Antichrist" will be given power to "overcome the saints" (Rev. 13:7), who will thus still be here at this terrible time and will "not" be advanced.
3 Qotes about the Pretribulation:
Charles H. Spurgeon: "The desire to escape the tribulation is a selfish desire. Rather, let our longing and worry be that we may glorify God through our lives as long as it pleases Him, and be it in the midst of toil and struggle and suffering."
Leonard Ravenhill: "Today's community wants to be raptured before its responsibility."
Corrie ten Boom: In China Christians were told: "Do not be concerned. Before the tribulation comes, you will be transformed and raptured. Then came a terrible persecution. Millions of Christians were tortured to death..."
Corrie ten Boom explained, these ones among us who say, that Christians will be able to escape all this are false teachers that Jesus was warning us to expect in the latter days, so I too see it as my duty to warn brethren in faith of such dangerous and above all unbiblical heresies, which will contribute to some brethren coming into this time unprepared.