The following are some famous aphorisms about self-improvement and their origins:

"As heaven moves vigorously, a gentleman should constantly strive for self-improvement." This sentence comes from "The Book of Changes", an ancient Chinese book Philosophy books. What it expresses is that the way of heaven is natural and everything changes. Only by constantly strengthening oneself can one walk with heaven and earth. This sentence encourages people not to be discouraged when facing difficulties and setbacks, but to work unremittingly in order to gain a foothold in a highly competitive society.

“I may be defeated by difficulties, but I will not be defeated.” This sentence comes from a speech by former US President Lincoln. Lincoln was a famous politician and leader in American history. He experienced many failures during his campaign for the President of the United States, but he did not give up and was finally elected in 1860. This sentence expresses his indomitable spirit and optimistic attitude towards life. He believes that only by constantly trying can he finally achieve success.

“Life is like riding a bicycle. Only by maintaining balance can you move forward.” This sentence comes from a speech by former US President Franklin Roosevelt. Roosevelt was an outstanding statesman and leader in American history. He served as President of the United States during the 1930s and 1940s and led the United States through the Great Depression and World War II. This sentence is a metaphor that life is like riding a bicycle. You need to constantly maintain balance in order to move forward on the road of life.

"You can fail temporarily, but you can't give up forever." This sentence is a famous African proverb, which means that failure is not terrible, but giving up is terrible. This sentence encourages people not to give up pursuing their goals because of one failure, but to persist in their efforts to ultimately achieve success.

These famous aphorisms all express a common theme: continuous self-improvement. They tell us that only through continuous efforts, perseverance, perseverance, and courage can we achieve success and achievement. No matter what difficulties and setbacks we encounter, we must continue to strive to meet the challenges.