"The Thirty-Seven Nats: A Phase of Spirit Worship Prevailing in Burma" is a book published in 1906 by William Griggs, which explores the Burmese belief in nats, a type of spirit or supernatural being in Burmese folklore.

Burmese Buddhism, like other forms of Buddhism, acknowledges the existence of various realms in the cycle of birth, death, and rebirth (samsara). Among these realms are several hells or lower realms known as "Naraka," which are places of suffering and punishment for those who have committed grave sins in their previous lives.

In this Buddhist cosmology, there are numerous hells, each reserved for specific types of sins. These hells are often depicted as places of extreme torment and suffering.
Some hells are characterized by intense heat, while others are marked by extreme cold. There are hells where individuals are subjected to various forms of torture, and the severity of punishment corresponds to the gravity of their past actions.

The concept of Hell in Burmese Buddhism serves as a moral lesson, emphasizing the consequences of one's actions. Suffering in Hell is seen as a result of one's negative karma, and it is believed that individuals can eventually escape these lower realms through virtuous deeds and spiritual practice.

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