My understanding of Scripture is that the gospel of the kingdom must be preached into all nations, tribes and tongues before the end shall come, just as our Lord Himself said was the case in Matthew 24. The passages which warn believers to be ready for the Lord’s return do not necessarily require one to hold to the idea of an any-moment rapture. One of the most well-known passages, concerning the Foolish and Wise Virgins in Matthew 25, directly follows Matthew 24, in which Jesus expressly teaches that His return and gathering of the elect will be immediately AFTER the tribulation, the worst time of all time, the worst that ever shall be, according to how Jesus describes it. Believers are exhorted in Scripture to watch, to be sober, awake, ready for His appearing, because that is the kind of spiritual alertness we should always possess. We must never grow lax in our spiritual sobriety, nor should we ever slumber spirituality. Also, the statements in Scripture about the Lord coming as a thief each reveal in their own context that the warning is not concerning imminence as such, but is instead about those who are not zealous and awake for the Lord.For example: 1 Thess 5:1Now concerning the times and the seasons, brothers, you have no need to have anything written to you. 2 For you yourselves are fully aware that the day of the Lord will come like a thief in the night. 3 While people are saying, “There is peace and security,†then sudden destruction will come upon them as labor pains come upon a pregnant woman, and they will not escape. 4 But you are not in darkness, brothers, for that day to surprise you like a thief. 5 For you are all children of light, children of the day. We are not of the night or of the darkness. 6 So then let us not sleep, as others do, but let us keep awake and be sober. 7 For those who sleep, sleep at night, and those who get drunk, are drunk at night. 8 But since we belong to the day, let us be sober, having put on the breastplate of faith and love, and for a helmet the hope of salvation. 9 For God has not destined us for wrath, but to obtain salvation through our Lord Jesus Christ, ESVAnd:Revelation 3:1b “‘I know your works. You have the reputation of being alive, but you are dead. 2Wake up, and strengthen what remains and is about to die, for I have not found your works complete in the sight of my God. 3Remember, then, what you received and heard. Keep it, and repent. If you will not wake up, I will come like a thief, and you will not know at what hour I will come against you. 4Yet you have still a few names in Sardis, people who have not soiled their garments, and they will walk with me in white, for they are worthy. ESVHope this helps,