I&#x27;d say that the realization that <i>you are the only person who is responsible for you</i> is only half-way there.  I&#x27;d say that full adulthood realization is that <i>you are the only person responsible for you, but you are</i> still <i>responsible for other people</i>.<p>The reason I say that is I&#x27;ve know individuals who have taken the first mantra to mean that they hold no responsibilities to other people.  That it is, in a reductio ad absurdum, that a driver has no responsibility to stay off the sidewalk and that the onus should lie entirely on the pedestrians to dodge her vehicle.