Hello Truthinlove,
How will it be that a believer and and unbeliever will be sharing a bed together up to the rapture??
The answer is they won't be sharing a bed. This is the primary difference between the true "rapture ready" Christian (2 Peter 1:14-15) and the twice dead one (2 Peter 2:20). The difference between the two is that the rapture ready Christian has already forsaken his life in the world, while the left behind Christian has not. This is why the proper passages to highlight in Luke 17 are verse 32-33.
In that day, he which shall be upon the housetop, and his stuff in the house, let him not come down to take it away: and he that is in the field, let him likewise not return back. Remember Lot's wife. (Luke 17:32-33)In 1 Thess. 5 we are promised that both the Great Tribulation and Day of Lord will not come like a thief upon true believers. First Thessalonians 5 obliterates the idea of an any-moment rapture. In each instance (before Great Trib. and DOTL) there will be a warning issued to believers to completely forsake their own lives in this world (similar to Rev. 18:4). Those who do act upon that warning will reap its reward (the Rapture). We see in Rev. 14:4-5 how the 144,000 are able to stand on the Day of the Lord because they were not defiled with women and no leaven or guile was found in their mouths. Leaven is a symbol for pride. This was the thing that Lot's wife could not rid herself of and is why she was left behind.
There is a corporate solidarity in the 144,000 firstfruits and all those who who escape the Day of the Lord, just as there is a corporate solidarity in the remnant of Judea who fled at the sign of the AOD (Matt. 24:15-18) and all those who escape the Great Tribulation. The thing that both groups shared was a willingness to forsake everything this world had to offer, just as it was the thing that Noah and Lot shared. Revelation 18:4 is a type of pre-rapture warning. Matthew 24:15-18 illustrates how we should react to that warning. And Revelation 14:1-5 shows us the result of acting on the warning.
However, the example of Lot's wife in Gen. 19:26 shows us the result of not acting on the pre-rapture warning. Lot's wife was turned into a pillar of salt and left behind because she was unwilling to forsake everything "in this world" in order to escape. Therefore, it isn't the rapture that is imminent, it is this warning to forsake everything in the world that is. This is what Luke 17 and Matthew 24 are illustrating. The one who is taken from the bed, field, world is already gone before the rapture happens. Although their physical bodies will be present along with unbelievers in the world at the rapture, their hearts and minds are in two completely different places. If you want to be rapture ready, you better be prepared to forsake everything in this world at any moment, even things that are not evil at all in themselves (buying and selling, marrying and being given in marriage...etc).
So....at the point of the rapture, believers will have been undergoing the great tribulation for a while now. Murder is rampant all over the globe and few believers will be alive towards the end.
There's no doubt there will persecution during the great tribulation. But the fear of physical persecution isn't the primary thing we are warned to flee from. The two things we are warned about most are deception and temptation. The temptation is going to be much greater than the persecution. The bible forewarns us in four places (1 Cor. 3:18-20; Eph. 5:6-10; 2 Thess. 2:3-4; 1 Jo. 3:7-11) how the Antichrist is going to attempt to deceive the elect. These passages should be of primary importance as it pertains to the Antichrist, not the physical persecution. But this is a difficult message to get across in Laodicea.