Revised Common Lectionary (Semicontinuous)

^8-10 But you should never lose sight of this fact, dear friends, that time is not the same with the Lord as it is with us—to him a day may be a thousand years, and a thousand years only a day. It is not that he is dilatory about keeping his own promise as some men seem to think; the fact is that he is very patient towards you. He has no wish that any man should be destroyed. He wishes that all men should come to repent. Yet it remains true that the day of the Lord will come as suddenly and unexpectedly as a thief. In that day the heavens will disappear in a terrific tearing blast, the very elements will disintegrate in heat and the earth and all that is in it will be burnt up to nothing.

Never lose sight of the eternal world

^11-13 In view of the fact that all these things are to be dissolved, what sort of people ought you to be? Surely men of good and holy character, who live expecting and earnestly longing for the coming of the day of God. True, this day will mean that the heavens will disappear in fire and the elements disintegrate in fearful heat, but our hopes are set not on these but on the new Heaven and the new earth which he has promised us, and in which nothing but good shall live.