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 are known in the world as messengers. Among them are holy beings of different grades, designated by Sufis as Wali, Ghauth, Qutb, Nabi, and Rasul. They differ one from the other in degree, according to the depth to which they penetrate into the world unseen, or to the breadth of the space they occupy in the universal consciousness, and also according to the width of the circle of humanity that is placed in their charge for its guidance. Nabi is the guide of a community, Rasul has a message for the whole of humanity, and each has a certain cycle of time for his message.