This dissertation consists of two main parts: a study and an analysis. The study is divided into two chapters . The first chapter, "The Evidence of Creation," provides definitions of creation from both linguistic and terminological perspectives. It then explores various viewpoints on the relationship between Allah and the world, explains the proof of creation and its premises, and presents scientific evidence and examples supporting the concept of the world's creation. The second chapter, "The Existence of the Non-Existent," defines the concepts of "thing" and "non-existence" both linguistically and terminologically. It presents the arguments for and against the existence of the non-existent, discusses the implications of considering the non-existent as something, and includes the opinions of Al-Jaitali on these issues . The second part of the dissertation is a critical analysis of the text from the chapter "The Condition of Monotheism for the Validity of Acts of Worship" to the chapter "Distinguishing between the Names and Attributes of Allah in Permissibility of Inquiry ". Key findings of the dissertation indicate a consensus on the existence of phenomena and the necessity for every phenomenon to have a cause. However, there is disagreement on the nature of the relationship between the phenomenon and its cause. The majority of the Mu'tazilites argue that considering the non-existent as something means it is known and can be spoken about, regarding the terminology and expression of the non-existent as a "thing" or "self ". Al-Jaitali's methodology combines transmission and extensive explanation, drawing from significant scholarly works, such as "Questions" by Al-Sufi and "Refutation of All Opponents" by Sheikh Abu Khazr. His approach includes linguistic analysis of poetic verses, detailed explanations of the issues raised, and support through references to the Quran, Sunnah, consensus, logical proof, and scholarly traditions. He addresses and refutes opposing arguments using logical evidence, employing a dialectical method to persuade his audience.