<TSOU-I> The main topic of this book is changing. It's need some conditions. The conditions are tide. All the being in the cosmos, they change must be the right time. As can be seen the time in the traditional thinking is very important. All the beings in the cosmos are breed in an endless succession. They circulation animated. Actions are suffocate, life is manacle. How to against the terrible situation in the balanced, or find the way to solve it. THen it could be balanced. <HIS-TZE-HSIA-CHIHUAN> said:「the person who knows change is intelligent」 Because they know how to Iet life become balance and how to solve the terrible situation. How to be that intelligent person. It's have to know "tide" in the <TSOU-I>. It's also the main topic we talk. There are several key points: 1.Tides are include the time and chance. 2.Tides are include the situation and strength. 3.Tides are include the environment and experience. 4.Tides are include the subjective and objective. 5.Tides are include the changeless and change. 6.Tides are include the invisible and accidentals. 7.Tides are include the capability and reality.