If you read history you will find that the Christians who did most for the present world
were precisely those who thought most of the next. The Apostles themselves, who set
foot on the conversion of the Roman Empire, the great men that built up the Middle
Ages, the English Evangelicals who abolished the slave trade, all left their mark on the
earth, precisely because their minds were occupied with Heaven. 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 the earth “thrown in”: aim at earth and you will
get neither.
— C.S. Lewis
