In religion and theology, revelation is the revealing or disclosing of some form of truth or knowledge through communication with a deity or other supernatural entity or entities.
Some religions have religious texts which they view as divinely or supernaturally revealed or inspired. For instance, Orthodox Jews, Christians and Muslims believe that the Torah was received from Yahweh on biblical Mount Sinai. Most Christians believe that both the Old Testament and the New Testament were inspired by God. Muslims believe the Quran was revealed by God to Muhammad word by word through the angel Gabriel (Jibril). In Hinduism, some Vedas are considered apauruṣeya, "not human compositions", and are supposed to have been directly revealed, and thus are called śruti, "what is heard". The 15,000 handwritten pages produced by the mystic Maria Valtorta were represented as direct dictations from Jesus, while she attributed The Book of Azariah to her guardian angel. Aleister Crowley stated that The Book of the Law had been revealed to him through a higher being that called itself Aiwass.
A revelation communicated by a supernatural entity reported as being present during the event is called a vision. Direct conversations between the recipient and the supernatural entity, or physical marks such as stigmata, have been reported. In rare cases, such as that of Saint Juan Diego, physical artifacts accompany the revelation. The Roman Catholic concept of interior locution includes just an inner voice heard by the recipient.
In the Abrahamic religions, the term is used to refer to the process by which God reveals knowledge of himself, his will, and his divine providence to the world of human beings. In secondary usage, revelation refers to the resulting human knowledge about God, prophecy, and other divine things. Revelation from a supernatural source plays a less important role in some other religious traditions such as Buddhism, Confucianism and Taoism.