Every process, whether in the realm of nature or of society, progresses and develops by reason of its internal contradiction and struggle, and the movement of human knowledge should also progress and develop along with it.

• 任何过程，不论是属于自然界的和属于社会的，由于内部的矛盾和斗争，都是向前推移向前发展的，人们的认识运动也应跟着推移和发展。