I don't understand it

Why.  Why are we so damn conditioned to worry?  To worry about life, things, stuff, work, our looks, our words, our bodies, everything!  Why does one contemplate what clothes to wear?  Does it matter?  Is that guy sitting over there really going to care that you wore flip-flops with those jeans and that sweater?  How dare you! ...Seriously people?...  I'm not saying just don't give a shit about anything, but just ease the fuck up.  Everything in this world is temporary.  Everything!  In a matter of years, which is absolutely NOTHING in comparison to the entire existence of this universe, everything will be gone, everything will be dust.  Everything changes.  Nothing stays.  So why?  Why??  Why worry?  Do what you love!  Do what you feel you must do!  Do it!  And do it with all of your heart!  Love people!  Breathe the air!  Taste flavors!  Touch skin!  LIVE!!!