Pranayama regulates breath by desha (region), kala (duration), samkhya (cycles).
When body, mind, & breath benefit, we benefit from pranayama.
Vachikakriya accrues virtue. Dharma is not limited by time and space.
Prana kriya charms the kundalini & activates aspects of the respiratory system.
Silent sound forms of prana kriya cast a spell on pranic system to open chest.