What do you mean?
You will find several Bible verses speaking on "thief in the night" speaking to many Christians not knowing, or believing, in Jesus calling us UP to Him in the heavens BEFORE the Second Coming. These people will be left behind because they weren't looking for the "Thief". The thief in the night for the Jews was the chief priest walking in the night to find guards sleeping and took their garments. On some Feast of Trumpets in the future we will be removed as Christians to meet Christ in the air and will avoid the coming Tribulation. Rev 3:10 speaks of the Church of Brotherly Love being spared this test. The letters to the churches in Revelation are probably the most important verses in the whole Bible other than Jesus explaining how to be saved. They describe each one of us and speaks to what we need to do to avoid the AntiChrist and the judgement on the Earth. There are some denominations that don't believe that the Church will be Raptured and therefore will be left behind to face the AntiChrist and the Seals, Trumpets, and Bowels of God.
To keep from writing a book here and wasting a bunch of time for people that believe differently, Can we all agree that God has rehearsals for what He is about to do? The Feasts of the Lord spoken of in Lev 23 have given us The Passover murder of Jesus, Unleavened Bread in the Temple cleaning, and First Fruits with Jesus rising from the grave. 50 days later Pentecost came giving us the Holy Spirit verses the Law on Mt Sinai, thousands of years earlier. God has drawn this picture and kept them to the day and hour he promised. The next thing on God's clock is Rosh Hashanah, or Feast of Trumpets. It must happen on some Trumpets Feast in the future or God has been fooling His people for eons. In Israel, the day no one knows is known to be Rosh Hashanah because it lasts 2 days. Just as Turkey Day is known in America as Thanksgiving, Jews know this day.
Now, has there been an end of days before in Scripture? The Great Flood of Noah was just such a day. Matthew even tells us, as it was in the days of Noah to get our attention for the End of Days. If we look at Genesis 7:4, God warned Noah to get in the Ark 7 days in advance of the rain. Noah didn't get one drop of God's judgement on his head. The same with Lot. Lot and family were warned at least 3 days before fire fell. Jonah was sent to warn Nineveh before their judgement and they repented. The way to avoid God's judgement is for the people to repent. At some point, we won't repent.( I believe that day is now) Read Leviticus 18:22-30 and tell me if we can fix this before God comes. I highly doubt it.
There is MUCH more on these prophesies in the rest of the Scriptures. Isaiah, Ezekiel, Joel, Zech, and many others all address this coming calamity.
Rev 1:3 tells us the book is a prophesy and we are blessed to read it. Some claim it happened in 70 AD but it was written in 92-94 AD and John tells us it is about things to come. Would you not feel blessed if you read it, believed it, and followed it's Truth to avoid having your head removed by the Beast?
If you look back at the times God spoke to His people, they heard His voice, but others heard lighting and thunder as the men with Paul on the road to Damascus. A word study of "lightning and thunder" throughout the Bible will reveal much about who hears what.
Talking about this on FR, I'm sure will get the flames going, but that's fine for me. My Job is to warn people so there blood is not on my head. Many people only believe what someone tells them and never look into what they said. That includes Bible teachers. The Bible was written by a Spirit, to Spiritual people, for Spirit filled people. It can only be understood by people with the Holy Spirit. This is why Jesus wrote in parables for the most sensitive subjects. If people want to know God things, they can find it in the Bible if they look. It's not kept secret, but you must hunt for it to find it. People that love the Lord will search out the Truth but others won't think it's that important and stop looking. When Jesus calls us to His Wedding Feast, we will spend the next 7 years in the "Ark" He built for us while the world is destroyed. There will be "foolish virgins" left behind lacking in "oil" and they will either take the mark and end up in hell, or lose their head for Christ. I think this is good to know info even for your children as they will face the Beast if they are left behind. God tells us that to die for our friends is love. What people miss is, if we are friends of God, We will die for Christ. You are said to die to your flesh under water at your baptism and are raised as a new creature. If you didn't kill your flesh under the water and continued to live in your flesh, you will face the Beast and MUST lose your life for Christ to be with Him. If you decide to take the mark to live, you just bought yourself no more than a couple of years, then you will receive a plague and die, then be thrown into the lake of fire.
Give your life to the Lord, get Raptured, spend eternity in Heaven, avoid the head chopping. It's all good!