A Hyang (Kawi, Javanese, Sundanese, and Balinese) is an unseen spiritual entity that has supernatural power in ancient Indonesian mythology.[1] This spirit can be either divine or ancestral. The reverence for this spiritual entity can be found in Sunda Wiwitan, Kejawen, and Balinese Hinduism. In the modern Indonesian this term tends to be associated with gods, devata, or God.[1] The realm where the hyangs reside is called kahyangan; the abode of gods, now a synonym for svarga or heaven in modern Indonesian.[2]
Hindu Balinese spiritualism describes hyang as a venerated spiritual existence, that deserves a special reverence. Hyang is commonly described as a sacred and luminous personal form. It is the name for a spiritual existence that has supernatural powers, portrayed like the sun in a dream. His arrival in a person's life gives contentment without a pause for a long time, which is indistinguishable between dream and reality. Indonesians generally recognize this term to refer the cause of beauty, the cause of all existence (creator), or simply to refer God.[1]
The term "hyang" now widely associated with Balinese Hinduism developed in ancient Java and Bali more than a millennium ago. However this term actually has an older origin, it has its root in the indigenous animism and dynamism beliefs of Austronesian people that inhabit the Indonesian archipelago. Native pre-Hindu Buddhist and pre-Islamic Indonesians venerated and revered ancestral spirits, they also believed that some spirits may inhabit certain places such as large trees, stones, forests, mountains, or any sacred places. The "hyang" concept indigenously developed in the archipelago and not considered to have originated from India n dharmic religions.
Before the adoption of Hinduism, Buddhism and Islam, the natives of the Indonesian archipelago believed in powerful but unseen spiritual entities that can be both benevolent or malevolent. They also believed that the deceased ancestor is not gone away or disappeared completely. The ancestral spirit may gain god-like spiritual power and remain involved in their offspring's worldly affairs. That is why the veneration and reverence to honor ancestors is an important element in the belief system of native ethnic groups, such as Nias, Dayak, Toraja, Papuan ethnic groups, as well as many ethnic groups in Indonesia.
In ancient Sundanese, Javanese, and Balinese society, this unseen spiritual entity is identified as "hyang". These ancestral divine spirits are believed to inhabit high places, such as mountains, hills, and volcanoes. These mountainous regions are considered sacred realms, as the abode of gods and the resting place for the soul of the ancestors.
Several ancient Indonesian inscriptions dated from Hindu-Buddhist period (8th to 15th century), mentioned hyang either as the name of sanctuary or the name of deity revered in that temple.[3]
In Sundanese, the term "nga-hyang" means "disappear" or "unseen". It is suggested that the word "hyang" has linguistic relation with the Malay word: "hilang" which means "disappear". In its development, the term "hyang" become the root word for many terms that still known and used in modern Indonesian:
Hyang are said to only move in straight lines. Accordingly, traditional Balinese buildings have a wall called an aling-aling just inside the doorway, which keeps the spirits out because they only move in straight lines, and hence bounce off.[8] Similar walls can be seen at the entrance of some Javanese cemeteries. Parallel beliefs are found in other spiritual traditions, as in British corpse roads.