This article strives to present the theory of transcendent security and further elaborate on the theoretical foundations that constitute the theory. In line with the definition, the article discusses and eventually provides an answer to the question of “what is Islamic security theory?” by means of theorizing, inference, and citation methods, respectively. The conceptual and theoretical foundations of the arguments are based on the conceptual and theoretical frameworks of two separate fitrahs (innate natures). The concept, aspects, reference, and levels of security, the concept of friends and the foes, and the approaches to acquire security are defined based on the said framework.