Divine light
In theology, divine light (also called divine radiance or divine refulgence) is an aspect of divine presence, specifically an unknown and mysterious ability of angels or human beings to express themselves communicatively through spiritual means, rather than through physical capacities. The term "light" has been widely used in spirituality and religion. Various local religious concepts exist: Buddhism. Buddhist scripture speaks of numerous buddhas of light, including a Buddha of Boundless Light, a Buddha of Unimpeded Light, and Buddhas of Unopposed Light, of Pure Light, of Incomparable Light, and of Unceasing Light. Christianity. Bible commentators such as John W.  Ritenbaugh see the presence of light as a metaphor of truth, good and evil, knowledge and ignorance. In the first Chapter of the Bible, Elohim is described as creating light by fiat and seeing the light to be good. Eastern Orthodoxy. In the Eastern Orthodox tradition, the Divine Light illuminates the intellect of man through "theoria" or contemplation. In the Gospel of John, the opening verses describe God as Light: "In Him was life and the life was the light of men. And the light shines in the darkness and the darkness did not comprehend it." (John 1:5) In John  8:12, Christ proclaims "I am the light of the world", bringing the Divine Light to mankind. The Tabor Light, also called the Uncreated Light, was revealed to the three apostles present at the Transfiguration. Quakers. "Quakers", known formally as the "Religious Society of Friends", are generally united by a belief in each human's ability to experience the light within or see "that of God in every one". Most Quakers believe in continuing revelation: that God continuously reveals truth directly to individuals. George Fox said, "Christ has come to teach His people Himself." Friends often focus on feeling the presence  of God. As Isaac Penington wrote in 1670, "It is not enough to hear of Christ, or read of Christ, but this is the thing – to feel him to be my root, my life, and my foundation..." Quakers reject the idea of priests, believing in the priesthood of all believers. Some express their concept of God using phrases such as "the inner light", "inward light of Christ", or "Holy Spirit". Quakers first gathered around George Fox in the mid–17th century and belong to a historically Protestant Christian set of denominations. Hinduism. In Hinduism, Diwali — the festival of lights — is a  celebration of the victory of light over darkness. A mantra in Bṛhadāraṇyaka Upaniṣad (1.3.28) urges God to 'from darkness, lead us unto Light'. The Rig Veda includes nearly two dozen hymns to the dawn and its goddess, Ushas. Sant Mat. In the terminology of Sant Mat, Light and Sound are the two main and expressions of God and from them all the creation comes into existence. Inner Light (and Inner Sound) can be experienced with and after an initiation by a competent Guru during meditation, and are considered the better way to reach Enlightenment. Manichaeism. Manichaeism, the most widespread Western  religion prior to Christianity, was based on the belief that god was, literally, light. From about 250-350 CE devout Manichaeans followed the teachings of self-proclaimed prophet Mani. Mani's faithful, who could be found from Greece to China, believed in warring kingdoms of Light and Darkness, in "beings of light," and in a Father of Light who would conquer the demons of darkness and remake the earth through shards of light found in human souls. Manichaeism also co-opted other religions, including Buddhist teachings in its scripture and worshipping a Jesus the Luminous who was crucified on a  cross of pure light. Among the many followers of Manichaeism was the young Augustine, who later wrote, "I thought that you, Lord God and Truth, were like a luminous body of immense size, and myself a bit of that body." When he converted to Christianity in 386 CE, Augustine denounced Manichaeism. But by then, the faith had been supplanted by ascendant Christianity. Manichaeism's legacy is the word Manichaean -- relating to a dualistic view of the world, dividing things into either good or evil, light or dark, black or white. Neoplatonism. In "On the Mysteries", Iamblichus refers to the divine  light as the manifestation of the gods by which divination, theurgy, and other forms of ritual are accomplished. Zoroastrianism. Light is a core concept in Iranian mysticism. The main roots of this thought is in the Zoroastrian beliefs, which defines The Supreme God Ahura Mazda as the source of light. This very essential attribute is manifested in various schools of thought in Persian mysticism and philosophy. Later this notion has been dispensed into the whole Middle East, having a great effect of shaping the paradigms of different religions and philosophies emerging one after another in the region. After the Arab  invasion, this concept has been incorporated into the Islamic teachings by Iranian thinkers, most famous of them Shahab al-Din Suhrawardi, who is the founder of the illumination philosophy.