Leaving is a natural part of the story.
It's important that we tune ourselves to change in order that we might recognize the proper cycles of growth.

Nothing last forever without evolving.  When we honor "right timing" we give ourselves the opportunity to flow in our lives - in relation to others, ourselves, our work, our creative expression.

Even the best relationships, situations require change.  Rather than resisting the inevitable challenges inherent in them, it's important to recognize the "upset" as a call to facilitate some new level of growth in your life.

You can resist it or flow with it.
End it or sustain a love affair with denial.

When is it time to go?  

It's time to go when you can no longer grow where you are.  When you've extracted all you can from a situation, a relationship, a city, an ideology.  It's important, in fact crucial to honor life's natural leaning toward motion - and follow suit.  Stop stuttering, being unsure, unclear or unwilling to see.

Move or die.

Leaving is a natural part of the story.