Are there any famous aphorisms about integrity that can be used in high school essays?

Be true to yourself and you will not deceive others. ——(English) Shakespeare

Credit is hard to come by but easy to lose. Credit that takes 10 years to accumulate is often lost due to temporary words and deeds. ——(Japan) Daisaku Ikeda

The most important thing in interpersonal relationships is sincerity, and it must come from the sincerity of the heart. Sincerity is an invincible sword in society, and you should carry it wherever you go. ——(中) Sanmao

Credit is like a mirror. As long as there are cracks, it cannot be connected as before. (Switzerland) Amir

Not all shiny things are gold; not all beautiful words are good words. ——(English) Shakespeare

It is better to be trustworthy than to be famous. ——(USA) Roosevelt

Honesty is better than all wisdom, and it is the basic condition of wisdom. ——(Germany) Kant

Those who have lost their trust are already dead in this world. ——(UK) Harbert

Keeping your promises is like defending your honor. ——(France) Balzac

Once a word is spoken, it is difficult to follow it. ——Chinese proverb

Be honest with others, and others will not bully you; be honest with others, and everything will be accomplished. ——(Middle) Feng Yuxiang

Credit is both an intangible power and an intangible wealth. ——(Japan) Konosuke Matsushita

Conscience is the sentry in each of our hearts. It is there on duty to monitor us and not do anything illegal. ——(British) Somerset Maugham

Once a word is spoken, it is hard to follow. ——Chinese proverb

If you follow an upright and honest life, you will surely end up with a clear conscience. ——(Su) Gorky

Don’t lie, don’t be afraid of the truth. ——(Russian) Leo Tolstoy

Frankness is the product of honesty and courage. ——(US) Mark Twain