1. Heaven is moving vigorously, and a gentleman strives to constantly strive for self-improvement. ——"The Book of Changes"

2. When you see the virtuous, think about them, and when you see the virtuous, you should introspect yourself. ——"The Analects of Confucius"

3. If you are full, you will suffer losses, but if you are modest, you will benefit. ——"Shang Shu"

4. Work is accomplished by hard work, but wasteful by play; success is achieved by thinking, and destroyed by casualness.

——Han Yu

What about the above four sentences? I hope they will be helpful to you!