He need wear no distinctive robe nor display a tonsured head. He need pursue no special tradition, enter no monastic establishment, nor cut himself off from ordinary life. That he is a philosopher is not to be advertised by such outward signs. Yet if he feels a personal vocation to follow these customs, he is also free to do so. It is simply that there is no necessity in the general sense.
-- Notebooks Category 1: Overview of the Quest > Chapter 3: Independent Path > # 245