The Maasai people have a polytheistic religion and believe in a supreme being called Engai or Nkai, who is considered the god of the sky and rain. Engai is thought to reside in the mountains and is believed to be the source of all life and the provider of all sustenance. The Maasai also believe in a number of other gods, spirits, and ancestors, each of which is associated with a specific aspect of life, such as health, fertility, and protection.