1. Any valuable knowledge I have learned comes from self-study. Darwin

2. Reading all good books means talking to many noble people. Descartes

3. Knowledge is as precious as human blood. Without blood, people will be weak; Without knowledge, people's minds will dry up. Gao Shiqi

4. It's never too late to study. Gorky

5. Less and more eager to learn, like the sunrise sun; Strong and eager to learn, such as the light of Japan and China; Being old and eager to learn is as bright as a candle. Liu Xiang