If there is a still tree.  There must be no wind.  But wind will eventually come.  And when that moment happens, most people never notice.  Sometimes it's fast, almost simultaneous.  But other times, its slow.  And you see each branch slowly start to move like the others.  Until the whole tree is engulfed in wind.  Until the tree is no longer still.  Nor even itself.  For the tree is now the wind.  The branches move wherever the wind happens to go.  The tree loses itself.  But nevertheless, the wind will stop.  The tree will be still again.  And when that happens the tree becomes itself again.  Although it does have a few less leaves, and maybe even a few less branches.  The tree is itself again.  This moment, this transformation, however, is rarely ever noticed.