You become mature when you become the authority for your own life.

--Joseph Campbell


Seth says

Mark de LA says
folks explain what that means to you if anything – mature means what? authority means what? what perhance is authority for one’s life mean? 

Si says
Being mature simply means being someone others respect and would use as a role model for themselves.

Authorty and leadership is well answered over here on About: Evolution of Evil on AHC - comment 64275 (comment 64345)