Then Tangzi took advantage of the situation and said to Qi Jiaozi: "The most important of the Mohist knowledge theory is name, reality, combination, and for, that is. Pen & Fun & Pavilion www.biquge.info for, Zhixing is also the knowledge that we should know to do something. When we do something, we must have the purpose of doing it, and the act of doing it. The former is called the will, and the latter is the line. The general name of the line is called.

And there are six kinds of "for": survival, death, change, swing, governance, and transformation.

The purpose of making armor and building a platform is to make a country survive, and it is also to "survive" and "for"; The purpose of curing a disease is to make it disease-free, and it is also to "die" and "for"; Buying and selling is for the purpose of trading, and it is "easy" for "for"; To eliminate the so-called is to "" for "for"; The rule of smooth growth and cultivation is to "govern" for "for"; If you want things to change gradually, you want to "be" them.

If we want to achieve our aspirations, we must have a considerable journey. The knowledge of knowing how to do it is also called "for".

Therefore, the study of knowledge has a practical purpose. Applying what you have learned is the view of knowledge handed down by the ancestor Mozi. We Nanmo study my son's logical viewpoint in order to better study the laws of the world, and the laws we have studied will inevitably be applied to reality in the end.

However, I dare to ask what Dongmo has been doing all these years? As far as I know, Dongmo has lived a good life these years, and he no longer needs to be a craftsman, and he doesn't do anything practical that is suitable for society, but he has turned to the study of dialectics. In Xie Zi's opinion, who betrayed the Mo family? ”

Xie Zi heard Tangzi's question, and immediately defended: "We turned to the study of dialectics, which is really a last resort. If a school is to develop and grow, it must also adapt to the times. If the world is like this, the holy king does not do it, the princes are indulgent, and the priests are arrogant. If you are not good at dialectic, you are not good at learning and art.

When the first master Mozi went to the state of Chu to stop the army, not only did he have a defensive weapon in hand, but more importantly, he could persuade Lu Ban and the king of Chu to have superb eloquence! If I wait for the children of the Mo family, walk the world, and talk to the princes and generals about the dangers of war, but I can't convince them, then what faces do the disciples of the Mo family still exist in the world? Why is it strange that we study dialectics? ”

"In this way, now Dongmo has begun to develop in the direction of vertical and horizontal strategists? I really don't know how the Guiguzi disciples will feel when they get such news! The entanglement sneered.

"The strategists lobbied the princes for the benefit of the king and for their own benefit; And we are walking the world and lobbying the princes, in order to stop the war and save the people. How can you compare our actions with the actions of the strategists? You Nanmo keep saying that the knowledge you have studied is "learning to apply", but I don't know where it can be used? Qi Jiaozi asked again.

The tangzi replied, "We will study astronomy, formulate a more reasonable calendar, and use it on the people; By measuring geography, we can solve the disputes of the people, and we can show that the taxes of a place are used on the lord; Everything in the world is governed by laws, and we will find out the laws in them, so that all the people will not be confused by witches. These are all examples of our "use", which one is not a good thing for the benefit of the country and the people? ”

Qi Jiaozi listened to Tangzi talk about Nanmo's new research, which involved a large range of applications and a wide range of applications, so he couldn't say anything more.

However, a young scholar next to Qi Jiaozi was immediately interested, and he asked Dai Yan directly: "I didn't expect your science to even study astronomy and geography!" I am Zou Yan, a Qi person, who happens to be interested in astronomy and geography, and I am willing to discuss it with you! ”

Seeing that Zou Yan began to join the debate, Prince Tian Bijiang also specially introduced to Dai Yan: "Childe, Zou Zinai is the youngest Mr. Jixia, and his research on heaven and earth can be described as profound!" And its knowledge is broad and grandiose, and we and other Qi people praise it as "talking about Tianyan"! ”

The name Zou Yan, Dai Yan had also heard of it in later generations, and he knew that this person was the genius of the Yin and Yang family who created the way of the five elements of Yin and Yang!

In modern times, when people mention the five elements of yin and yang, words like feudalism and superstition pop out of everyone's head, and everyone thinks that it is this discipline that hinders the development and progress of ancient Chinese science!

However, in today's era of a hundred schools of thought, Zou Yan's theory of yin and yang and the five elements is the highest achievement in astronomy!

After all, the five elements of yin and yang have created a complete cosmology, although it is full of fallacies, but it is a systematic system after all! This is a great improvement over the universe of heaven and earth, which was previously known purely by witchcraft and the doctrine of ghosts and gods!

Moreover, the way of the five elements of yin and yang has almost influenced all dynasties from Qin to Song! Among them, the historical concept of "five virtues always" even provides a legal basis for the replacement of dynasties, and its impact is not far-reaching!

For such a famous figure, Dai Yan didn't dare to underestimate it, so he took the initiative to salute Zou Yan, and then asked Zou Yan: "Dare to ask Zou Zi, what do you think heaven and earth are?" How to observe the changes in heaven and earth? ”

Zou Yan is known as "Talking about Tianyan", and his favorite thing is that others ask him about heaven and earth. To Dai Yan's question, he replied without thinking about it: "Although heaven and earth are grand, the source of heaven and earth is only the two qi of yin and yang, plus the attributes of the five elements.

Yin and yang are combined, all things grow, and natural phenomena such as wind, clouds, thunder, and rain are formed in the sky; Large topographic bodies such as rivers, seas, mountains and rivers are formed locally; In the direction, it is east, west, south and north, and in the climate, it is spring, summer, autumn and winter.

The four images of the heavens are corresponded to by ears, eyes, mouth, and nose; The four images of the earth, people have qi, blood, bones, and flesh to correspond to them; and a man had three hundred and sixty joints for the number of days of the week; Therefore, the heavens have four hours, the earth has four directions, people have limbs, knuckles can observe the sky, palm prints can observe the heavens, the earth, and man are one.

The five elements, namely metal, wood, water, fire, and earth. It is not only the attribute of all things in the world, but also the basis for the changes of all things in the universe and various natural phenomena. The Five Elements form the five stars of Venus, Jupiter, Mercury, Mars, and Saturn in the sky; On the ground, the five attributes of metal, wood, water, fire, and earth are formed; In human beings, there are five virtues: benevolence, righteousness, courtesy, wisdom, and faith.

Between the five elements, they restrain each other and influence each other. The five elements of heaven, earth, and man are connected to each other and influence each other. If there is a change in Jupiter in the sky, there will be a change in everything on earth and in the benevolence of people. The changes of heaven and earth, the rise and fall of states, are all related to the changes of the five elements, and the wise monarch of the Tao must not be observed.

If you want to observe heaven and earth, you can know the five elements of yin and yang. ”

After Dai Yan heard what Zou Yan said, he burst out laughing.

Zou Yan asked with a puzzled face: "Dare to ask why Gongzi is laughing?" ”

Dai Yan stopped laughing and said to Zou Yan: "It's nothing, what I like most is to listen to other people's serious nonsense!" I just listened to Mr. Fang's words, it was quite interesting, so I laughed! ”

Zou Yandeng was furious and said to Dai Yan: "As the prince of the Song Kingdom, after he became a nobleman, he thought that the prince should at least know etiquette and etiquette, but he didn't want the prince to be so unbearable and openly deny the truth of the world!" Childe asked the sky and got the answer, but he was so sarcastic! If you don't respect the truth of heaven and earth, you will inevitably have great trouble in the future! ”

Dai Yan replied to Zou Yan: "Zou Zi doesn't have to curse me, before you, my sorcerer of the Song Kingdom, Bu Xian, has cursed me. His curse has indeed been fulfilled, and I have been punished by thunder and lightning twice, but am I not standing here alive today? ”

Hearing this kind of anecdote, Prince Tian Bijiang was also very interested, and he asked: "Gongzi can actually be thunder and lightning in his body and not die, he can really be described as a blessed person!" But I wonder how Childe did it? ”

Dai Yan was struck by lightning twice, the first time he crossed, and the second time he did it intentionally, and used it to kill Bu Xian. As for the principle of electricity, he had no intention of hiding it, he said directly to the prince: "There is no him, but I know the principle of thunder and lightning." Copper, iron, etc., can conduct electricity, but the shell of a conductive object can form a protective effect on its interior, so that its interior is not affected by electric fields. I was caught in the thunderbolt and did not die because I was in a closed bronze cage when I experienced the power of thunder and lightning, so this cage could protect me. It's as simple as lightning in your body and not dying. If the prince is willing, he can naturally become a "God-blessed person" who does not die with thunder and lightning in his body. ”

The prince was extremely interested in this, and even planned to experiment in private.

Regarding the thunder and lightning knowledge proposed by Dai Yan, Zou Yan just kept it in his heart silently, and just wanted to leave it for verification in the future, but this was not the time to care.

Therefore, Zou Yan asked Dai Yan again: "Since Gongzi thinks that the theory of the five elements of yin and yang is nonsense, but I don't know what Gongzi thinks about heaven and earth?" ”