First Sentence

"If not at the beginning of Wittgenstein's later philosophy, since what starts philosophy is no more to be known at the outset than how to make an end of it; and if not at the opening of Philosophical Investigations, since its opening is not to be confused with the starting of the philosophy it expresses, and since the terms in which that opening might be understood can hardly be given along with the opening itself; and if we acknowledge from commencement, anyway leave open at the opening, that the way this work is written is internal to what it teaches, which means that we cannot understand the manner (call it the method) before we understand its work; and if we do not look to our history, since placing this book historically can hardly happen earlier than placing it philosophically; nor look to Wittgenstein's past, since then we are likely to suppose that the Investigations is written in criticism of the Tractatus, which is not so much wrong as empty, both because to know what constitutes its criticism would be"