What's the main theme of "tranquility falls"?

The story's key idea is that your acts may be negative, so measures have to be betaken to reverse the damage that you might have caused. Brayden initially allows his indignation get the better of him and he decides to chuck his juice pocket into the water out of rage. After reading a tale about a bear who discovers who his acts have poisoned a water, Brayden acknowledges that he has made a mistake and takes the juice pouch out of the water.