He will keep all mention of philosophy to himself and break his silence only when true need to do so manifests itself. He will do his exercises and practices in secret, unobserved, so that he may remain undisturbed. Where he must depart from the norm in public, as in following a fleshless diet, he will try to behave inconspicuously and thus draw no attention to his departure. From the standpoint of conventional society, he will not ordinarily be known as a follower of philosophy. In the Japanese phrase, "he will walk the Path as if not walking it."
-- Notebooks Category 20: What Is Philosophy? > Chapter 5: The Philosopher > # 161