Wittgenstein overturned centuries of philosophical reflection on the nature of 'the inner', of our subjective experience and of our knowledge of self and others. Traditional conceptions of 'the outer', of human behaviour, were equally distorted and so too was the relation between the inner and the outer.

 This highly accessible account offers an illuminating introduction to Wittgenstein's philosophy of mind and to his conception of philosophy, showing how Wittgenstein's examination of our use of words clarifies our notions of mind, body and behaviour.