Tractatus Logico-Philosophicus

Perhaps this book will be understood only by someone who has himself already had the thoughts that are expressed in it—or at least similar thoughts.—So it is not a textbook.—Its purpose would be achieved if it gave pleasure to one person who read and understood it.
The book deals with the problems of philosophy, and shows, I believe, that the reason why these problems are posed is that the logic of our language is mis- understood. The whole sense of the book might be summed up the following ...