Learning without thinking is a waste, thinking without learning is peril.

If you persevere, the rotten wood will not break; if you persevere, the metal and stone can be carved.

Flowers will bloom again, and people will never be young again.

One year's plan is better than planting valleys, ten years' plan is better than trees, and a lifetime plan is better than planting people.

Heaven moves vigorously, and a gentleman strives to constantly strive for self-improvement. The terrain is kun, and a gentleman carries things with kindness.