This is firstly, for me, a yoga realization. Like all my 'yoga realizations' it applies nicely to life. Check it out. Feeling muscle pain with the mind sends a 911 response through the sympathetic nervous system and all the muscles clench up. Like this:
Feeling with the breath is like a cool breeze blowing softly on your sunlit face...by the sea. This song is a nice theme for the thought. Feeling with the breath to shine light like the sun, in asana and in life.