Being peaceful does not mean not acting. On the contrary, yoga practice is very much about being prepared for action.
 
Yet, yoga practice is also about being prepared for stillness, silence, and being able to really let go.

In my own life I have found that only with a combination of action and faith and trust do I find tranquility.  

What creates a "peaceful presence?" For me the deep breathing and stretching are a great help, but nothing does gets me there like knowing that God is present in my life.