This lecture explores the foundational role of ontology within the worldview of Islam, framing the study of being as being as the primary starting point for philosophical inquiry. By tracing the historical evolution of the term from Aristotle’s "theology" to modern metaphysics, the lecture clarifies that while individual sciences study specific things, ontology investigates the universal reality of existence itself. A central theme is the distinction between conceptual existence, which resides in human thought, and ontological existence, which is an active, dynamic force rooted in the Divine Will. The lecture emphasizes that true reality is primarily grasped through consciousness and existential awareness rather than mere discursive reasoning. Drawing on the thought of Al-Attas, it describes the world not as a collection of independent entities, but as a series of manifestations or "sacred effusions" gushing forth from the ultimate reality of Allah. This spiritual framework suggests that as a person transcends ordinary perception, they move from a state of multiplicity toward a unified vision where the separateness of the material world is recognized as a reflection of divine presence. Ultimately, the lecture posits that the journey toward metaphysical truth requires the development of spiritual faculties to achieve a direct, intuitive encounter with the Divine. Through the stages of annihilation (fana') and subsistence (baqa'), the individual soul realizes its connection to the source of all being, understanding that existence is a continuously renewed gift. By aligning human consciousness with this ontological hierarchy, the lecture prepares the ground for understanding how we know and interact with a world that is essentially a divine self-disclosure.