Peace. It doesn't mean to be in a place where there is no noise, trouble or hard work. 
It means to be in the midst of those things and still be calm in your heart. 
- Unknown

I do not want the peace that passeth understanding. 
I want the understanding which bringeth peace. 
-Helen Keller

Peace is not merely a distant goal that we seek, 
but a means by which we arrive at that goal. 
- Martin Luther King, Jr.

God cannot give us a happiness and peace apart from Himself, 
because it is not there. There is no such thing.
-C.S. Lewis