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. It is since Christians have largely ceased to think of the other world that they have become so ineffective in this.
C. S. Lewis, whose full name was Clive Staples Lewis, was a British writer and scholar. He is best known for his works of fantasy literature, including "The Chronicles of Narnia" series and "The Space Trilogy." Lewis' imaginative storytelling, allegorical themes, and philosophical insights have made him one of the most beloved and influential writers of the 20th century. His works continue to inspire readers of all ages and have left a lasting impact on the genre of fantasy literature. Lewis' contributions extend beyond fiction, as he also wrote extensively on Christian apologetics and theological topics, engaging in debates and offering perspectives on faith and reason.