 In the Preface to PI, Wittgenstein states that his new thoughts would be better understood by contrast with and against the background of his old thoughts, those in the Tractatus; and indeed, most of Part I of PI is essentially questioning. Its new insights can be understood as primarily exposing fallacies in the traditional way of thinking about language, truth, thought, intentionality, and, perhaps mainly, philosophy. In this sense, it is conceived of as a therapeutic work, viewing philosophy itself as therapy. (Part II (PPF), focusing on philosophical psychology, perception etc., was different, pointing to new perspectives (which, undoubtedly, are not disconnected from the earlier critique) in addressing specific philosophical issues. It is, therefore, more easily read alongside Wittgenstein’s other writings of the later period.)