In anger the rhythm of breathing is much quicker, even so much as to make speech impossible. The saying, "speechless with anger" is proverbial. Therefore the breath acts on the mind as well. The lion, the leopard, and other fierce creatures have a very irregular breath; there is no rhythm; they are short-lived. The cobra never becomes excited; it breathes slowly, and attracts its food from any distance by mere concentration of will. It is very long-lived.