Chapter III Sloka 21

y*dacrit ´eˇSt─devetrae jn>,
s yTÓma[< kůÚte laekStdnuvtRte.

yadyadścarati ■re ¸has
tattadevetaro janaÎ | 
sa yatpramś§aŇ kurute 
lokastadanuvartate ( 3|21)||

 Because, whatever noble persons do, others follow.
Whatever standard they set up, the world follows.