The article presents a first part of an interpretation of the intention of Wittgenstein’s Tractatus. The intention itself used to be considered a rather marginal topic until so called new-Wittgensteinian interpretations. The present article considers main sources to show what kind of content we can ascribe to the book. Its aim is to prove that Tractatus is not purely practical exercise, however without stripping the book of its therapeutic side. The first part considers the preface and the motto of the book.