The HeartMath Solution: The Institute of HeartMath's Revolutionary Program for Engaging the Power of the Heart's Intelligence
by Doc Lew Childre, Howard Martin
"Shifting focus from head to heart improves nervous system balance, heightens cardiovascular efficiency, and energizes communication between heart and brain, bringing more coherence to the mind and emotions."
"If you have difficulty shifting your attention to the area around the heart, try this: focus on your big toe; wiggle it, see how it feels, and notice how easy it is to redirect your attention to this area. Now try shifting your attention to the area around the heart. Pretend that your breath is going in and out through the area of the heart (or hold your hand over your heart) to help focus your attention in this area. Keep your focus there for ten seconds more."