The same attribute of self-sacrifice in its higher grade of evolution is seen among the masters of humanity who act as officials of the infinite government and who are known in the world as messengers, avatars, or god-heads. Among them are to be found holy beings of different grades, recognized by Sufis as Wali, Ghous, Qutub, Nabi, and Rasul. They differ from each other according to the extent of their reach in the world unseen, and how vast a space they occupy in the universal consciousness, also how large a circle of humanity is given under their control for guidance.