Books like this help you expand your thoughts and what you can learn from the world and the life at large. What impressed me the most is the dialectical nature of the work, you feel as if you are talking to Tolstoi over a dinner table on these things that matter most to him.

So far I have not been able to find another book like this, but many people seem to recommend The Meaning of Life by E D Klemke. I would also like to try Schopenhauer or Emil Cioran, but they offer amore pessimistic outlook of life , not sure though.