However the day of the Lord will come, unexpectedly like a thief. The heavens will explode with a thunderous roar, and the elements will be destroyed as they are burned up. The earth and everything in it will vanish. Since everything is going to be destroyed in this way, what kind of people should you be? You should be living lives that are pure, dedicated to God, waiting expectantly and being eager for the coming of the day of God. That day the heavens will catch fire and be destroyed, and the elements will melt in the heat.