1. If you don’t climb a high mountain, you don’t know how high the sky is; if you don’t go to a deep stream, you don’t know how thick the earth is.
2. A journey of a thousand miles begins with a single step.
3. What you learn on paper will eventually make you realize it, but you will definitely know that you have to do it in detail. ——Lu You
4. Not hearing is worse than hearing it, hearing it is worse than seeing it, seeing it is worse than knowing it, and knowing it is worse than doing it. Learning ends with practice.
——"Xunzi·Confucianism Effect"