Metaphysics (Ukrainian "Метафизыка") is a philosophical treatise written by the ancient philosopher Aristotle. In this book, the author explores fundamental questions about the nature of being, reality, the soul, time and space. The work examines the concepts of essence, existence, causality and objective reality. The leading topics of "Metaphysics" are the study of general principles of being, consideration of abstract concepts and analysis of metaphysical problems. Aristotle distinguishes between different types and substances, introduces the concepts of form and matter, investigates the principles of existence and the nature of the highest entities. Aristotle's "Metaphysics" is one of the most important works of ancient philosophy and remains the subject of study and discussion in philosophical circles even today. This book contributes to the understanding of philosophical concepts and helps readers deepen their knowledge of the philosophical aspects of being and existence.