I had a guy in my church one time who had a favorite saying: “It’s all gonna burn.”
It was his way of saying, “The stuff of this life just isn’t that important.”
He wanted to keep the things of the Kingdom in focus.
Peter reminds us that this temporal side of life isn’t going to last. So, in light of that, how should we live? He returns to his main theme: holy and godly lives.
Our lives count. We need our hearts and minds fixed fully on the One who is the Author of our salvation. He will complete that work. And in that day, may we be ready.
9 The Lord isn’t slow to keep his promise, as some think of slowness, but he is patient toward you, not wanting anyone to perish but all to change their hearts and lives. 10But the day of the Lord will come like a thief. On that day the heavens will pass away with a dreadful noise, the elements will be consumed by fire, and the earth and all the works done on it will be exposed.
11 Since everything will be destroyed in this way, what sort of people ought you to be? You must live holy and godly lives, 12 waiting for and hastening the coming day of God. Because of that day, the heavens will be destroyed by fire and the elements will melt away in the flames. 13 But according to his promise we are waiting for a new heaven and a new earth, where righteousness is at home. (2 Peter 3:9-13, CEB)
Apprentice 2 Jesus 
1 Cor 7:29-31
I tell you, brothers and sisters, the time is running out.
From now on, let those having wives act as not having them,
those weeping as not weeping,
those rejoicing as not rejoicing,
those buying as not owning,
those using the world as not using it fully.
For the world in its present form is passing away.