2 Peter 3:13

Nevertheless we, according to His promise, look for new heavens and a new earth, wherein dwelleth righteousness.

The apostle here applies the lesson of the facts adduced by him to the situation of the believers: Since, then, all these things are to be dissolved, what kind of people ought you to be in holy conduct and godliness, waiting for, and hastening toward, the coming of God's day, in which the heavens will be dissolved with fire and the elements in burning will melt. The thoughts and minds of the Christians are under no circumstances to cling to the things of this world, to the riches of this earth, for they know that this world with all it contains will not remain forever, but will certainly be destroyed. In view of this certainty the minds of the Christians are, on the other hand, ever busy with the question as to what effect their knowledge of the coming catastrophe should have on their whole moral and religious life. The apostle gives the answer, telling us that our conduct should be holy and unblamable, that our behavior at all times should express true godliness and reverence of His holy will. In this state of mind we should eagerly await the coming of God's great day, be concerned about being acceptable to the Lord in His Judgment, bend every effort to keep the simple faith and trust in Jesus in our hearts and to show the fruits of this faith in a life of love toward Him and our neighbor. Ever and again we Christians repeat to ourselves the fact that this world is not our home, that all the things in which men trust at the present time will be dissolved in fire and reduced to a condition where the elements themselves will be in a fluid state, having not the slightest resemblance to their present form. The present heavens and the present earth will pass away, not in utter destruction, but to be changed into a new form of existence.

That is what the apostle now proceeds to show for our consolation: But new heavens and a new earth we expect according to His promises, in which righteousness will have its abode. After this old earth has passed away according to the apostle's description, there will be new heavens and a new earth. That is not a vain hope, a mere day-dream on the part of the Christians, but our faith is based upon God's promises, Isaiah 65:17; Isaiah 66:22. Since our expectation is founded on the Word of God, therefore we shall not be ashamed. This old earth is filled with sin and unrighteousness, the very creatures, the dumb animals groaning with the pain of the curse of sin, Romans 8:22. But after the last day there will be no more sin; in the new earth there will live only righteousness and joy and peace. That is our hope, our comfort and consolation. We know that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us and to us, Romans 8:18.