According to search-discovered classical Islamic scholarship, the concept of Nur (Light) is a central Quranic metaphor representing the ultimate source of all guidance, knowledge, and reality. Allah is introduced as the 'Light of the heavens and the earth' (Quran 24:35), a statement interpreted by authorities like Ibn Abbas not as a physical form, but as the Divine Being who guides and illuminates all of existence. This Divine Light is manifested in the world as revelation—the Quran itself is called a 'Nur'—and as faith within the heart of a believer. The famous Verse of Light (Ayat an-Nur) provides a detailed parable, which scholars like Ibn Kathir and Al-Ghazali explain as the pure, innate capacity of the believer's heart (the lamp in a glass) being ignited by the oil of divine revelation, resulting in 'Light upon Light'. This spiritual illumination is the antithesis of 'Zulumat' (Darkness), which symbolizes ignorance, disbelief, and misguidance. Therefore, the spiritual journey in Islam is defined as being brought out of darkness into light by Allah's will.