From Day 63 of Meditations from the Mat by Rolf Gates and Katrina Kenison:

If we are to find lasting happiness, we must not only clean up our rooms but clean up our thoughts as well. Fortunately, that is precisely what the practice of yoga is all about. To begin, we let go. We let go of our thoughts, our old scripts, our expectations, our darkness. The solution is not to fight but to let go. We let go of everything and hold on to nothing. Over and over again, on the mat and off, we let go. This letting go is a purification. We let go and it is like dropping a pebble into a pond, the ripples slowly growing to encompass our every waking moment. In our letting go we create an emptiness, a space that health and grace will move into. We begin to live with a joyful awareness.

^z - 2013-10-18