Even the philosopher who goes out of his way to avoid provoking anyone in any way--who never shows hate, passion, wrath, or resentment, who keeps his ego out of his dealings with others, and who in short does all he can to diminish the chances of disturbing them--even such a man will nevertheless be criticized, attacked, interfered with, or abused, in spite of his good thoughts and good deeds. Such is the evil in men and so widespread is it. But this will happen only if he ventures into any dealings or any relations with them, if he appears publicly among them to teach or serve in some way. It will not happen if he prudently remains aloof, apart, secluded, obscure, a hermit--or, if that be not possible, if he goes out of his way in order not to attract attention. In that case, he will enjoy his peace undisturbed by the world's opposition. But it would then also be the world's loss.
-- Notebooks Category 20: What Is Philosophy? > Chapter 5: The Philosopher > # 152