At the end of every yoga class, we invite the sound of the bell. As we lie down in Savasana (corpse pose) we practice stillness, the hardest of all poses. Our breath becomes the focus to bring us back to the present moment. Over and over we smile to the wandering mind, but gentlely and persistently return to sensation of our breath.  Then at the end of this pose and the end of our practice, the bell is invited with the intent of

I listen, I listen!
May the sound of the bell call me back
To my true home.

This video explains this practice so beautifully. Please enjoy: