Famous aphorisms about theory and practice:

1. Just one theoretical proof can impress me more than fifty facts. —— Diderot

2. Seeing is worth hearing a hundred times. ——Ban Gu

3. You will know it later, and it will be difficult after you follow it. ——Wei Yuan

4. A knowledgeable person who does not practice is equivalent to a bee who does not make honey. ——Saadi

5. If you wake up in your heart, say it with your mouth, or do it on paper, it will be useless if you don’t learn from it. ——Yan Yuan

6. Theory that is separated from revolutionary practice is empty theory, and practice that is not guided by revolutionary theory is blind practice. ——Stalin

7. Only practice can overcome the errors of experience. ——Ba people

8. What you hear with your ears is worse than what you see with your eyes, what you see with your eyes is not as good as walking on it, and what you are walking on is not as good as using your hands to discern. ——Liu Xiang

9. It must be practice and practical life experience that taught him such profound theories. ——Shakespeare

10. Since ancient times, sages and sages have put practice first, followed by knowledge and speech. ——Lin Xiyuan

11. Theories that cannot stand the test of practice are useless and even harmful. ——Tao Zhu

12. Theory is turning into practice. Theory is energized by practice, revised by practice, and tested by practice. ——Lenin