开卷有得 Opening a book always brings something
Explanation
指读书总会有收获。形容读书的好处很多。
means that one always learns something when reading.
Origin Story
东晋时期，大诗人陶渊明从小就酷爱读书，尤其喜欢安静的环境。他常常一个人坐在书房里，静静地阅读。每当他打开书本，认真地阅读的时候，总会从书中获得知识和启发，常常废寝忘食，沉浸在书的海洋里。有一次，陶渊明的朋友子俨等人来拜访他，看到陶渊明如此专注地读书，不禁感叹道：‘开卷有得，真是令人羡慕啊！’陶渊明笑着回答说：‘是啊，读书确实能够使人增长智慧，开阔视野。’从此，“开卷有得”就成为了人们激励自己努力学习的名言。陶渊明的勤奋好学，也激励着一代又一代人不断地追求知识，提升自我。
During the Eastern Jin Dynasty, the great poet Tao Yuanming loved reading from a young age, especially in a quiet environment. He would often sit alone in his study, quietly reading. Every time he opened a book and read carefully, he would always gain knowledge and inspiration from the book, often neglecting food and sleep, immersed in the ocean of books. Once, Tao Yuanming's friends Zi Yan and others visited him, seeing Tao Yuanming reading so intently, they could not help but exclaim: 'Opening a book always brings something, that's really admirable!' Tao Yuanming replied with a smile: 'Yes, reading really does make people wiser and broaden their horizons.' From then on, "Opening a book always brings something" became a famous saying encouraging people to study hard. Tao Yuanming's diligence and love of learning also inspired generation after generation to constantly pursue knowledge and improve themselves.
Usage
多用于读书学习方面，也可用于其他方面，形容有所收获。
It is mostly used in the context of reading and learning, but it can also be used in other contexts to express that one has achieved something.
Examples
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只要你开卷读书，总会有收获的。
zhǐyào nǐ kāi juǎn dúshū, zǒng huì yǒu shōuhuò de
As long as you read, you will always gain something.
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开卷有得，读书益智。
kāi juǎn yǒu dé, dúshū yìzhì
Reading brings knowledge and understanding.