Aim for Heaven

Hope is one of the theological virtues. This means that a continual looking forward to the eternal world is not... a form of escapism or wishful thinking, but one of the things a Christian is meant to do. It does not mean that we are to leave the present world as it is.

If you read history you will find that the Christians who did most for the present world were just those who thought most of the next... It is since Christians have largely ceased to think of the other world that they have become so ineffective in this. Aim at Heaven and you will get earth "thrown in": Aim at earth and you will get neither."
-C. S. Lewis, Mere Christianity

"Since, then, you have been raised with Christ, set your hearts on things above, where Christ is seated at the right hand of God. Set your minds on things above, not on earthly things. For you died, and your life is now hidden with Christ in God." Colossians 3:1-3