Like the people in Noah’s time who laughed and mocked as he built the ark, the end of this age will come when the overwhelming majority are unprepared.
“But know this, that in the last days perilous times will come. For men will be lovers of themselves, lovers of money, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy, unloving, unforgiving, slanderers, without self-control, brutal, despisers of good, traitors, headstrong, haughty, lovers of pleasures more than lovers of God, having a form of godliness, but denying its power.” 2 Timothy 3:1-5
“But as the days of Noah were, so also will the coming of the Son of Man be. For as in the days before the flood, they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, and did not know until the flood came and took them all away, so also will the coming of the Son of Man be.” Matthew 24:37-39
Knowing this first of all, scoffers will come in the last days with scoffing, following their own sinful desires. They will say, “Where is the promise of His coming? For ever since the fathers fell asleep, all things are continuing as they were from the beginning of creation.” For they deliberately overlook this fact, that the heavens existed long ago, and the earth was formed out of water and through water by the word of God, and that by means of these the world that then existed was deluged with water and perished.” 2 Peter 3:3-6
“But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap. For it will come upon all who dwell on the face of the whole earth. But stay awake at all times, praying that you may have strength to escape all these things that are going to take place, and to stand before the Son of Man.” Luke 21:34-36