But the day of the Lord will come like a thief. The skies will disappear with a loud noise. Everything in them will be destroyed by fire, and the earth and everything in it will be exposed. In that way everything will be destroyed. So what kind of people should you be? You should live holy lives and serve God, as you wait for and look forward to the coming of the day of God. When that day comes, the skies will be destroyed with fire, and everything in them will melt with heat.