Which classic is the school motto of "virtue can be renewed and vigor can be promising"

I Ching

During the Spring and Autumn Period and the Warring States Period, the vigorous and promising thought should come from the golden sentence of the Book of Changes: a gentleman is good at heaven and strives for self-improvement, and a gentleman is rich in terrain and carries things with morality. The Book of Changes was written by Confucius, and its fundamental source is the Book of Changes, which shows that its ideological roots are extremely far-reaching and can be traced back to the ancient Fuxi period. Its prevalence should begin in the Spring and Autumn Period of Confucius.

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