Similarly, thought is a system. That system not only includes thought and feelings, but it includes the state of the body; it includes the whole of society - as thought is passing back and forth between people in a process by which thought evolved from ancient times.
同样,思想也是一个系统。这个系统不仅包括思想和情感,还包括身体的状态;它包括整个社会,因为思想是在人与人之间来回传递的,思想是从古代进化而来的。