I read it somewhere
Empty jar represents the LIFE:
One day a Psychology professor placed an empty jar on his table.

1. He proceeded to fill the jar with golf balls until the jar is full.
   Then the professor asked the students whether the jar was full or not
   The Students replied that the jar is full
2. He then poured some pebbles into the jar. The pebbles filled the space between the golf balls.
   Then the professor asked students whether the jar was full or not
   The Students replied that the jar is full.
3. He poured salt into the jar. The salt filled the empty spaces between pebbles and golf balls.
   The professor again asked students whether the jar was full or not
   The Students again replied that the jar is full
4. Finally the professor poured a glass of beer into the jar filling the empty spaces in the jar
   Then the professor said, "Students I want you to recognize that this jar represents your life."
   The golf balls are the important things. Your family, your children, health, friends and favorite passions. If everything else was lost and only they remained, your life would still be full.
   The pebbles are the other things that matter like your job, your house or car.
   The salt is everything else, the small stuff
   If you put the salt into the jar first, he replied, “there is no room for the pebbles or the golf balls.”
   The same goes for life
   If you spend all your time and energy on the small stuff you will never have room for the things that are important to you
   Pay attention to the things critical to your happiness
   Spend time with your children. Spend time with your parents. Visit your grandparents. Take your spouse out for dinner. Go out with your friends. There will always be time to clean the house and mow the lawn
   Take care of the golf balls first, the things that really matter. Set your priorities. The rest is just salt
   Finally one of the students raised their hand and asked what the beer represented. The professor smiled and said: “I am glad that you asked. The beer just shows that no matter how full your life may seem, there’s always room for a couple of beers with a friend.”
   Life is A world stage where we just come, play our part and then depart from there. As William Shakespeare says All The World's A Stage from the play As You Like It. I think it's a good metaphor to describe life as an actor/actress playing our part on a world stage. Because in a way life lies between birth and death. It just about living the time we get, trying to be happy against all odds and spreading a smile. People make life complicated by overthinking about it. Life is not as philosophical as people make it.