We are looking forward to a new heaven and a new earth.
The Bible doesn't say that heaven is our final destination. It looks forward to the day when the whole creation will be made new. This will be the Day of the Lord, the day when our prayers for the kingdom to come are finally answered.
We are looking forward to that day. Everything we have glimpsed in Jesus will become fully real. To use Peter's words, righteousness will finally have a home.
And when will this happen? We don't know. Peter tells us that with the Lord a day is like a thousand years, so we have only waited slightly under two days so far. It could be a long time yet. Or maybe not, because the Lord will come like a thief, and thieves tend to come when you are not expecting them.
So, in the light of this, what sort of people ought we to be? Peter says that we ought to live holy and godly lives. These are the lives he has already written about: lives of faith, goodness, knowledge, self-control, perseverance, godliness, brotherly kindness and above all love. This the way we look forward to the Lord's Day. On that day everything else will melt in the heat and everything that is of God will rise into eternity.
This is our faith. Let's not fall away from our secure position.