Hope is one of the Theological virtues. This means that a continual looking forward to the eternal world is not (as some modern people think) 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.
C. S. LewisThat thing is Freedom: the gift whereby ye most resemble your Maker and are yourselves part of eternal reality.
C. S. Lewis...if all we mean by our love is a craving to be loved, we are in a very deplorable state.
C. S. Lewis