The quote comes from "The Book of Changes·Qian": "The movement of heaven is vigorous, and a gentleman should constantly strive for self-improvement."

Self-improvement, its literal meaning is: to strengthen oneself, one must make unremitting efforts ( The explanation in the Chinese dictionary is: work hard and never slack off); the deeper meaning is: no matter how bad a person's situation is, through persistent efforts and dedication, he can become a strong self. If you want to make yourself stronger, You must persist and never give up your efforts.