Tractatus Logico-Philosophicus is the only book-length work published by Austrian
philosopher Ludwig Wittgenstein in his lifetime. He wrote it as a soldier and a
prisoner of war during
World War I. First published in
German in 1921 as
Logisch-Philosophische Abhandlung, it is now widely considered one of the most important philosophical works of the
twentieth century. The
Latin title was originally suggested by
G. E. Moore, and is a homage to
Tractatus Theologico-Politicus by
Benedictus Spinoza. The reason for Wittgenstein's "notorious" literary style—his utterly sober and succinct manner of expressing himself—has generated much speculation by commentators. Though Wittgenstein in later writings sharply differed with the philosophical ideas he expressed in the Tractatus, he retained the basic writing style—short sentences or paragraphs rather than narrative exposition in all of his writings.
As the last line in the book, proposition 7 has no supplementary propositions. It ends the book with a rather elegant and stirring proposition: "
What we cannot speak of we must pass over in silence." (In German: "
Wovon man nicht sprechen kann, darüber muß man schweigen.") The Ogden translation renders it: "Whereof one cannot speak, thereof one must be silent."
Photo of M.A.Numminen. Song by M.A.Numminen.