2 Peter 3:10-13

But the day of the Lord will come like a thief; when it comes, the heavens will disappear with a horrific noise, and the celestial bodies will melt away in a blaze, and the earth and every deed done on it will be laid bare.  Since all these things are to melt away in this manner, what sort of people must we be, conducting our lives in holiness and godliness,  while waiting for and hastening the coming of the day of God? Because of this day, the heavens will be burned up and dissolve, and the celestial bodies will melt away in a blaze!  But, according to his promise, we are waiting for new heavens and a new earth, in which righteousness truly resides.

You don't hear thieves coming, and their intent is to steal something. The thing being taken on the day of the Lord is everything that is false in this world. All pretense and falsehood will shatter when Jesus hits the scene on that day. Our very way of life, everything we know except for God the Father through Jesus Christ: all of it passes away. Holy Spirit, please guide us and convict us of how to live each day in the many spheres that we influence. Transform and perfect our lives that we are found living right before the Lord on that day! Come Lord Jesus!