由表及里 from the outside to the inside
Explanation
由表及里，汉语成语，意思是从表面现象深入到本质。
From the surface to the inside, a Chinese idiom meaning to go from superficial phenomena to the essence.
Origin Story
著名画家张先生，收到一幅来自农村老人的画作。起初，张先生觉得画作只是简单的农村景色，笔触略显粗糙，色彩也并不鲜艳。然而，随着张先生的仔细观察，他发现画作中蕴含着深厚的感情，朴实的线条里透露出对田园生活的热爱，色彩的搭配也别具匠心，更能体现出自然和谐之美。这幅画作用看似简单的表面掩盖着深邃的内涵，张先生不禁赞叹老人的艺术功底。他意识到，欣赏艺术作品要由表及里，才能真正领悟其精髓所在。
A renowned painter, Mr. Zhang, received a painting from an elderly farmer. Initially, Mr. Zhang thought the painting was simply a depiction of a rural scene, with slightly rough brushstrokes and not particularly vibrant colors. However, upon closer examination, he found that the painting contained profound emotions; the simple lines expressed a love for rural life, and the color scheme, unique and carefully chosen, was especially able to show the beauty of nature's harmony. This painting hid profound meaning under a seemingly simple exterior, and Mr. Zhang couldn't help but admire the artist's skill. He realized that appreciating a work of art requires understanding it from the outside in to truly grasp its essence.
Usage
由表及里，常用于形容对事物的分析过程，强调要深入理解事物的本质，而不是只停留在表面现象。
From the outside to the inside is often used to describe the process of analyzing things, emphasizing the need to deeply understand the essence of things rather than just stopping at surface phenomena.
Examples
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医生根据他的症状，由表及里地分析病情，最终找到了病根。
yisheng genju ta de zhengzhuang, you biao ji li di fenxi bingqing, zui zhong zhaodao le binggen
The doctor analyzed the patient's condition from the surface to the core, finally finding the root cause.
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学习不能只停留在表面，要由表及里，深入理解。
xuexi buneng zhi tingliu zai biao mian, yao you biao ji li, shenru lijie
Learning shouldn't just stay on the surface; one should delve into the heart of the matter and understand the essence deeply.