Tengrists view their existence as sustained by the eternal blue sky (Tengri), the fertile mother-earth spirit (Eje) and a ruler regarded as the chosen one by the holy spirit of the sky. Heaven, earth, spirits of nature and ancestors provide for every need and protect all humans. By living an upright, respectful life, a human will keep his world in balance and perfect his personal Wind Horse, or spirit. The Huns of the northern Caucasus reportedly believed in two gods: Tangri Han (or Tengri Khan), considered identical to the Persian Esfandiyār and for whom horses were sacrificed, and Kuar (whose victims are struck by lightning).