Source: Heng's Should Be Idle.
Revelation: Skills can be acquired through learning, and conduct can be improved through hard work. This paper expounds the possibility of improving moral cultivation by comparing skills and learning.
Another famous saying of Zhang Heng:
1, water can carry a boat and overturn it.
Revelation: Water can carry a boat, and it can also overturn it. This paper compares the relationship between the monarch and the people to that of a water boat, and emphasizes that the monarch must love the people, otherwise the people can support him as a monarch or overthrow him and throw him into the garbage dump of history.
2. Only virtue is expensive, and only valley is expensive.
Revelation: Governing the country only depends on talents, while ordinary people only value food. Talent is the treasure of the country, and food is the most important thing for the people. This is the truth.
The main influence of Zhang Heng
In the first year of Yangjia, Zhang Heng invented the earliest seismograph called Hou Feng Seismograph. According to "Zhang Hengchuan in the Later Han Dynasty", the seismograph is made of pure copper, with a round diameter of eight feet. The convex top cover looks like a wine bottle and is decorated with the image of tortoise, bird and beast in seal script.
On the basis of the armillary sphere invented by Geng Shouchang in the Western Han Dynasty, Zhang Heng created a more accurate and comprehensive armillary sphere according to his own armillary sphere theory. Ruilun pod is an automatic calendar created by Zhang Heng. It imitates the characteristics of strange trees and pods in mythology. Through the action of running water, a leaf appears from the first day of each month to the full moon, with 15, and then one leaf is collected every day until the end of the month.
Reference to the above content: Baidu Encyclopedia-Zhang Heng