What does it mean to be your own observer and be your own observer?

It means: people who are good at observing others should be good at observing themselves, and people who are good at observing themselves should be good at observing their own hearts.

This sentence is clearly Zhu Yunming's reading notes.

The main achievements of Zhu Yunming's calligraphy are cursive and regular script. Weeds come from Huai Su and Zhang Xu, which are closer to the Yellow Valley. Lifting strokes are used alternately, and the distance between lines is very tight, forming a visual effect of Wang Yang sea. What is even more rare is that regular script is quite rigorous and has the quaint atmosphere of Jin and Tang people.

This contrasting comprehensive quality is very similar to Zhang Xu's cursive poem volume, Zhiyuan River handwriting, cursive thousand-character text volume and public volume in the Tang Dynasty.

Extended data:

The most influential thing in Zhu Yunming's calligraphy history is that he advocated the style of attaching importance to books again in the Northern Song Dynasty, inherited the road of wild grass in the Tang Dynasty, changed the decline of wild grass after the Tang and Song Dynasties, and made wild grass reappear in the territory of calligraphy history.

He combined Huang Tingjian's cursive script and Tang's cursive script into a new cursive script pattern, making it a model of cursive script in Ming Dynasty, which started this trend. It played a leading role in the rise of cursive script of Xu Wei, Huang Daozhou, Ni, Wang Duo and others.

Since Zhu Yunming, calligraphers in Yuan Dynasty were obviously dissatisfied with Zhao Mengfu's calligraphy thoughts and aesthetic concepts. Therefore, the establishment of Zhu Yunming's cursive aesthetic style created the romantic style of Ming Dynasty, and also planted a seed for later calligraphers to push this style to a climax.

Baidu Encyclopedia-Zhu Yunming