"The material of Ra. The Law of One. Book 4" is the fourth part of a unique series of books that emerged as a result of the joint work of Nobel Prize laureates for physics and physiology, Donald Hoff and Harold Murray. In this book, the authors consider the concept of reality, studying the relationship of various factors that affect our life and existence in the universe. In this work, you will learn about the nature of light, sound, and time, as well as the origin of various forms of life on Earth. The book helps the reader to consider the world around him from a new perspective, revealing the secrets of the universe and nature. "The material of Ra. The Law of One. Book 4" is an exciting journey into the world of scientific discoveries and philosophical reflections, which will leave a mark in the heart of everyone who seeks to understand the essence of being and the nature of the universe.