During a famine on the island of Rhodes, a merchant sails in with a cargo of grain. Prices are sky-high. He also knows something the islanders don't: several more grain ships are not far behind him. He can sell at today's high price before the other ships arrive.

Cicero posed this scenario to ask what a decent person does when honesty costs them something. It's a useful test, because fairness is easy when it's free. Integrity shows up when it's expensive: when the honest answer loses a sale, when loyalty means standing by someone who's struggling, or when doing the right thing means disappointing someone with power.

That's also where the respect worth having comes from. People can admire a job title or a quick wit and still not trust the person with anything that matters. Here are ten things that philosophers from Confucius and Mencius to Socrates, Cicero and Seneca thought a person of real integrity wouldn't do, and what to try instead.

1. Hiding what the other person needs to know

So what should the grain merchant do? Two Stoic philosophers, Diogenes of Babylon and his student Antipater, disagreed. Cicero came down on the side of telling the Rhodians. Concealment, he wrote, "consists in trying for your own profit to keep others from finding out something that you know, when it is for their interest to know it." A person who does that, he added, is "shifty, sly, artful, shrewd, underhand, cunning" (On Duties 3.50-57, Walter Miller's translation).

Today it might be selling a car without mentioning the noise it makes in the cold, or letting a colleague walk into a meeting without telling them the plan has changed. A simple test: if they knew what I know, would it change their decision? If the answer is yes, it's the kind of thing Cicero thought they deserved to hear.

2. Flattering people with power

Mencius records a blunt observation from Confucius's disciple Zengzi: "They who shrug up their shoulders, and laugh in a flattering way, toil harder than the summer labourer in the fields." Another disciple, Zilu, describes people who make conversation with those they have "no great community of feeling" with: "If you look at their countenances, they are full of blushes" (Mencius 3B.7, James Legge's translation).

The modern version is easy to spot from the outside: laughing a little too hard at the boss's jokes, agreeing quickly with whoever controls the budget, becoming noticeably warmer when someone important walks in. Zengzi's point is that it's exhausting. The people around you, especially those with less power, tend to notice the contrast too.

A steadier approach is to treat the powerful the way you treat everyone else. Be courteous, and when you disagree, say so plainly: "I'm not sure that's right. Here's my concern."

3. Taking more than your share

When Aristotle set out to define injustice, he began with two kinds of unjust person. One breaks the law. The other is "the grasping and unfair man," and both, he says, "are thought to be unjust" (Nicomachean Ethics 5.1, W. D. Ross's translation).

Everyday graspingness is rarely dramatic. It's taking the biggest slice of credit for a group project, always claiming the best holiday dates, or arranging a shared cost so you pay a little less. The amounts may be small, but people tend to keep track of who always comes out ahead.

Sometimes the most respected move is to take the smaller share on purpose: "You take the Christmas break this year. I'll cover it."

4. Excusing "small" dishonesty

An official proposed reducing the taxes and duties for now and finishing the reform the next year. Mencius answered with a story about a man who stole his neighbor's chickens every day. When someone told him it was wrong, he replied that he would cut back to "only one fowl a month, until next year," and then stop. Mencius's verdict: "If you know that the thing is unrighteous, then use all despatch in putting an end to it." Then he asks, "why wait till next year?" (Mencius 3B.8).

The modern chicken is usually small: padding an expense claim, telling a client something is "almost done" when it hasn't started, quietly rounding up hours. "I'll stop after this project" is the same logic as one chicken a month.

When you notice something like this in yourself, the respectable move is the one Mencius recommends. Stop now, and fix what you can.

5. Being one person in public and another in private

The Great Learning, a short Confucian classic, says that "the superior man must be watchful over himself when he is alone." It describes a lesser person who does wrong in private, then puts on a good face whenever someone worthy appears. But the observer, it says, "beholds him, as if he saw his heart and reins; of what use is his disguise?" Its conclusion: "What truly is within will be manifested without" (Great Learning, commentary ch. 6, James Legge's translation). "Reins" here is an old word for the kidneys, meaning a person's innermost self.

The modern version might be someone polished in meetings but curt in private messages, or charming with guests and short-tempered with family. The text may be optimistic about how easily people see through a disguise. But over time, the gap usually shows.

The aim isn't to be the same in every setting. It's to treat people decently whether or not anyone important is watching.

6. Treating friends differently as your fortunes change

Cicero quotes the poet Ennius, "the hour of need shews the friend indeed," then gives two ways people let their friends down. Most people show their "untrustworthiness and inconstancy," he says, "by looking down on friends when they are themselves prosperous, or deserting them in their distress" (On Friendship ch. 17, Evelyn Shuckburgh's translation).

Both still happen. Someone gets a promotion and stops returning old friends' calls. A friend loses a job or goes through a divorce, and people who were around for the good times go quiet.

The fix is usually small and specific. If you've done well, keep showing up for the people who knew you before. If a friend is struggling, a short message is better than silence: "Thinking of you. Want to grab a coffee this week?"

7. Going along with something you know is wrong

In Plato's Apology, Socrates recalls a moment under the Thirty, the oligarchy that briefly ruled Athens. They ordered him and four others to arrest a man named Leon of Salamis so he could be put to death. "The other four went to Salamis and fetched Leon, but I went quietly home." Socrates adds that his refusal might have cost him his life had the regime not fallen soon after (Apology 32c-d, Benjamin Jowett's translation).

Few of us face anything like that. The everyday versions are smaller: signing off on a report you know is misleading, laughing along with a cruel joke about an absent colleague, staying quiet about a safety problem. Notice that Socrates didn't make a speech. He simply didn't go.

Sometimes the respected move is just as quiet: "I'm not comfortable doing that."

8. Refusing to give rivals their due

Plutarch argued that "there must be no scanting of commendation or due honour in the case of an enemy who has justly gained a fair repute." Doing so, he said, "wins greater commendation for those who bestow it, and inspires confidence, when later a man makes a complaint that he does so, not because he hates the person, but because he disapproves of the action" (How to Profit by One's Enemies 9, Frank Cole Babbitt's translation).

That second point is practical. If you never acknowledge a rival's good work, your criticism of them starts to sound personal. If you can say, "That's a strong idea, and I think we should use it," people are more likely to take you seriously when you disagree with them later.

9. Forgetting the people who helped you

Seneca listed several kinds of ingratitude: denying you received a kindness, pretending you didn't, and failing to return it. But "the most ungrateful man of all is he who forgets it," he wrote, because "the man from whom all recollection of the benefit has passed away can never become grateful" (On Benefits 3.1, Aubrey Stewart's translation).

Success stories often get retold as solo efforts. The manager who took a chance on you, the friend who lent you a couch to sleep on, the teacher who pushed you quietly drop out of the version you tell at dinner.

Remembering them out loud costs nothing. Mention them when you tell the story, or send a short note: "I was thinking about how much you helped me when I was starting out."

10. Holding others to standards you don't meet

Mencius summed up a common failing with a farming image: "The disease of men is this: that they neglect their own fields, and go to weed the fields of others, and that what they require from others is great, while what they lay upon themselves is light" (Mencius 7B.32).

It might be the manager who insists on punctuality and runs late, the friend who expects instant replies and takes days to answer, or the parent who enforces screen-time rules while scrolling at dinner. People notice the double standard, even when they don't say so.

A good habit is to apply a rule to yourself first. And when you've fallen short of a standard you're asking of others, saying so helps: "I've been guilty of this too, so let's both work on it."

Integrity doesn't guarantee respect

None of this guarantees respect. Some workplaces reward flattery, and some people never acknowledge decency however consistent it is. Doing the right thing can also cost something, as Socrates knew. Not everyone can afford to refuse a request from someone who controls their income or safety, and in those situations it's reasonable to look for allies, keep records and choose your moment.

Respect is also shaped by bias related to gender, race, age, disability and status, so the same behavior doesn't earn every person the same regard.

And no one avoids all ten of these perfectly. The point of Mencius's chicken story isn't that good people never slip. It's that when they notice a slip, they stop sooner rather than later.

One place to start

This week, think of one person who helped you years ago and has probably never heard how much it mattered. Send them a short, specific message.

It takes five minutes, and it's a small way of becoming the kind of person Seneca had in mind: someone who remembers.