This essay introduces a tension between the public Wittgenstein’s optimism about knowledge of other minds and the private Wittgenstein’s pessimism about understanding others. There are three related reasons which render the tension unproblematic. First, the barriers he sought to destroy were metaphysical ones, whereas those he struggled to overcome were psychological. Second, Wittgenstein’s official view is chiefly about knowledge while the unofficial one is about understanding. Last, Wittgenstein’s official remarks on understanding themselves fall into two distinct categories that don’t match (...) the focus of his unofficial ones. One is comprised of those remarks in the Investigations that challenge the thought that understanding is an inner mental process. The other consists primarily of those passages in PPF and On Certainty concerned with the difficulty of understanding others without immersing oneself into their form of life. In its unofficial counterpart, Wittgenstein focuses on individuals, rather than collectives. The official and the unofficial sets of remarks are united in assuming a distinction between understanding a person and understanding the meaning of their words. If to understand a language is to understand a form of life, then to understand a person is to understand a whole life. (shrink)