One of [the expressions taught in the Lotus Sutra] is the teaching of the “Mutual Possession of the Ten Realms.” This teaching is about the human mind, which is constantly changing. It is changing every moment, and with great complexity. This teaching also identifies the stages of enlightenment associated with each condition of the human mind. The Ten Realms are: Hell, Gaki, Chikusho (Animal), Ashura, Human Being, Ninten (gods and goddesses), Sravaka, Pratyekabuddha, Bodhisattva, and Buddha. In order to explain these more clearly, they are associated with various emotions. Hell expresses a hellish mind, filled with things such as hatred and suffering. The mind of Gaki expresses instinctive desire. The mind of Gaki expresses an ignorant mind, an ego, and selfishness. The Animal mind expresses being driven by instinctive desire. The mind of Ashura expresses anger, jealousy, and combat. The mind of Ninten (gods and goddesses) expresses joy and happiness. The mind of Sravaka expresses sympathy. The mind of Pratyekabuddha expresses emptiness. The mind of Bodhisattva expresses patience, and the mind of Buddha expresses compassion.