The mind becomes quiescent by regulation of breath,like a bird caught in a net. this is a means of mind control.— Maharishi Ramana.
Comment; Meaning of Maharishi Ramana that to find eternal bliss we have to still the mind. knowers of meditation wants to still our mind. by observing the breath coming in and goging out which is vippasna mind takes skill to be controlled like an a bird caught in net.