When we get angry, our breathing changes.  Every time we feel bliss, it has a different pattern.  Clearly, our moods affect our breathing.  And research has revealed it works the other way as well. 

If we breathe in deeply, and in a totally relaxed way, it's almost impossible to remain angry or frustrated.  Deep breathing creates a calmer, more relaxed, and happy person.

Next time you are angry or down, try it for yourself.  Consciously alter your breathing pattern.  Breathe deeper, slower.  In through the nose and out through the mouth.  Within minutes you'll find your bad mood dissipating.