Traditional beliefs are still practised by the Orang Asal people. Loosely classified as animism, the beliefs are not recognised by the state as a religion. Animistic beliefs are passed down through oral tradition due to the lack of a writing system in indigenous groups, who call their beliefs "agama adat" (traditional or customary religions). The different religions are rather varied, with different names and concepts for their supreme god and other supernatural deities. Most of the beliefs are heavily influenced by the environment, with physical features such as mountains, trees, valleys, and rivers being sacred. A close relationship with nature is nurtured, and the relationship of humans and nature is a strong part of the religion, with everyday activities such as hunting and gathering having spiritual significance.