This is the immortal famous saying of Zhang Zao, a painter in the Tang Dynasty. "Famous Paintings of Past Dynasties" records: "At the beginning, Uncle Bi was famous for his generation. At first glance, he was surprised, but he was just a bald deputy magistrate and touched the silk element with his hand, which was the result of his impatience. He said rashly,' If you learn from nature abroad, you will get the source of your heart at home.' Bi hong and ge bi. The words "nature from the outside, heart from the inside" summarize the whole process of objective phenomenon-artistic image-artistic image. Zhang Zao divided people's artistic creativity into internal and external aspects. Outside, it is necessary to learn from nature, that is, to learn from heaven and earth, which requires the creators of art to have a knowledge and understanding of objective things. In this way, the charm of nature can be expressed through artistic means. For example, the success of Qi Baishi's "Shrimp Map" not only stems from Qi Lao's profound artistic skills, but more importantly, his observation and understanding of shrimp. In other words, the creation of art is due to the creator's inner imagination, creativity, perception of beauty and so on. The creation of art is not a simple imitation, but a beautiful embodiment of everything in the universe. This kind of beauty comes from the creator's understanding of the objective world, his own understanding of the outside world, and contains the creator's own spirit. Only after you have a certain understanding of objective things, add imagination, spirit and so on. In order to create a good work. Therefore, if you learn from nature, you will get good works. Imagine where the creator's thoughts and feelings come from without knowing the outside world. People's consciousness comes from objective things, and their subjective understanding of beauty comes from objective things, so I think creation comes from nature and from the heart. The above is purely personal understanding, I hope it will help you!