The Book of Changes is the oldest oracle in the world and is composed of poems, images and advice. It is well known for its value to ancient Chinese oral traditions, along with the principles of Yinyang. Yinyang is one of the most important Chinese beliefs in the world. It is part of the essential framework established in Chinese culture for centuries. Together, The Book of Changes and Yinyang have become key ideas in Chinese philosophy and thus have greatly influenced the Chinese worldview. The Book of Changes is one of the five books on Confucianism. It provides people with guidance and reassurance. Its pages contain “a discussion of the divinatory system used by the magicians of the Zhou dynasty” (Britannica.com, “Yijing”). There are also sections within the book that explain the principles of the world. For this reason, The Book of Changes “was originally used for divination, its influence on Chinese minds and its universal popularity are due to cosmology…” (Birtannica.com, “Yijing”). The most unique thing about the book is that it uses 64 hexagrams, containing philosophical meanings. The hexagrams are formed in pairs and combined into eight trigrams. It is said that Emperor Fuxi discovered the trigrams on the back of a turtle's shell. Trigrams all contain three important things: a name, a root meaning, and a symbolic meaning. To create a hexagram you need to build it line by line, from bottom to top. All lines of a hexagram have a meaning, and "the text first explains each line separately, then provides a general interpretation of the unit" (Britannica.com, "Yijing"). Solid lines indicate Yang and broken lines indicate Yin. The Book of Changes incorporates them into the hexagram b and c...... in the center of the sheet... like this. By understanding the concept of Dao and harmony, it becomes easier to understand changes in life and how to sustain harmony. The Chinese worldview focuses on harmony, balance, and change because they are all connected in some way. When change occurs, we need to focus on keeping everything in balance. Too much or too little of something can be bad. However, once everything is balanced, our lives are full of harmony and peace. Chinese culture promotes these themes through The Book of Changes and Yin and Yang. The Book of Changes provides people with philosophical meanings to further explain how to maintain harmony. Yin and Yang have become the most important concept within the book because they provide a background and basis on how to achieve this harmony. By understanding the Book of Changes and Yin and Yang, one can profit from understanding how the world works.