"The word huma in the Persian language stands for a fabulous bird. There is a belief that if the huma bird sits for a moment on someone's head it is a sign that he will become a king. Its true meaning is that when a person's thoughts so evolve that they break all limitation, then he becomes as a king. It is the limitation of language that it can only describe the Most High as something like a king."

http://en.wikipedia.org/wiki/Huma_(mythology)