“The goal of all asana practice is doing them from the core of your being and extending out dynamically through to the periphery of your body. As you stretch, in turn the periphery takes messages back to the core. From head to heels, you must find your centre, and from this centre you must extend and expand longitudinally and latitudinally.
If extension is from the intelligence of the brain, expansion is from the intelligence of the heart. While doing asana, both the intellectual intelligence and the emotional intelligence have to meet and work together. Extension is attention, and expansion is awareness. It is the bringing of attention and awareness to the tips of your body and activating the skin.