His protection is greater at night. He is the one who passes on to the World Teachers various facets of Divine Truths as may be most desirable at the relevant age and time. Sarosh Yazad acts as the protector and guide of the holy from birth to transition . Sarosh means obedience . It is derived from the Avesta stem sru to hear .
Obedience implies hearing.
So He is the yazata who hears from God, communicates to Man what he hears from God and asks Man to obey God s message which he communicates. Sarosh Yazad ensures strict obedience of the entire creation to the laws of nature. Now the question arises, how can we 'invoke' or attune ourselves with Sarosh Yazad and how He is related to Urvaan, Manthra and Asha. The Urvaan or soul requires for its unfoldment certain units of vibration and Staota, in proportion to its own stage of present progress. In fact the staota produced by means of recital of Avesta Manthras is the kind and the rate necessary for a Soul born in the Zoroastrian fold and following the laws of Ashoi propounded in the Law of Unfoldment taught by the prophet Zarathustra.