Seneca wrote On Anger for his brother Novatus, and it remains one of the most practical books on temper ever written. One of its core pieces of advice is simple: don't act while the heat is still rising. "No one will postpone his anger," he wrote, "yet delay is the best remedy for it, because it allows its first glow to subside, and gives time for the cloud which darkens the mind either to disperse or at any rate to become less dense" (On Anger 3.12, Aubrey Stewart's translation).

The useful distinction today is between acknowledging anger while delaying your response and pretending nothing is wrong. Seneca himself went further: he also recommended concealing anger's outward signs (3.13) and ultimately wanted anger eliminated. His advice about delay remains useful even without adopting that whole position. "Even if you gain nothing by your adjournment," he wrote, "still what you do after it will appear to be the result of mature deliberation, not of anger."

Modern research points in a similar direction. A 2024 review of 154 studies found that activities that calm the body down, such as slow breathing or meditation, reduced anger and aggression. Activities that ramp up arousal, such as hitting a punching bag, weren't effective overall (Clinical Psychology Review, 2024). That doesn't prove every claim Seneca made. But it suggests his instinct to let anger cool, rather than let it out, was a sound one.

So when someone doesn't snap back at an insult, they may not be bottling anything up. They may be giving it time. Here are eight lessons from Seneca's essay that still work.

1. Give the first glow time to fade

An insult can make a reply feel urgent. A pause gives you room to notice that urgency and decide what to do with it. Use the interval to settle yourself, for example by breathing slowly and releasing tension in your shoulders, before deciding whether and how to respond.

He thought some offenses look completely different once the heat has gone. That's why he treated delay as a remedy, not a cop-out. A reply sent an hour later often isn't softer so much as clearer.

A simple way to practice is to give yourself a set waiting period before responding to anything that stings, whether it's an email, a text or a remark across the dinner table. "Let me think about that and come back to you" buys the time without pretending nothing happened.

2. Don't make decisions while you're angry

Seneca tells a story about Plato. Angry with an enslaved servant, Plato ordered him to bare his shoulders for a beating, then caught himself with his hand raised in the air. A friend walked in and asked what he was doing. "I am making an angry man expiate his crime," Plato replied, meaning himself. Another time, Seneca says, Plato asked a colleague to deal with a servant's fault instead: "Speusippus, will you please to correct that slave with stripes; for I am in a rage" (3.12).

The story reflects a world where beating enslaved people was considered normal, and Seneca praises Plato's restraint without questioning the punishment itself. That's a real limit of the example. But the habit at its center is still useful: Plato refused to trust his own judgment while he was angry.

Today, this might mean not resigning, quitting a project, sending the strongly worded reply or making a big decision about a relationship in the heat of the moment. If something has to be decided now, it can help to ask someone calmer for their view first.

3. Notice the warning signs

Seneca thought anger rarely arrives without warning. "It is easy to detect the first growth of our passions: the symptoms precede the disorder," he wrote. "Just as the signs of storms and rain come before the storms themselves, so there are certain forerunners of anger" (3.10).

For many people, those forerunners are physical: a tight jaw, a hot face, a faster heartbeat, a sudden urge to interrupt. Others notice a change in their thoughts first, such as replaying what was said or rehearsing a cutting reply.

It's worth learning your own early signs. When you spot one, treat it the way you'd treat dark clouds: as a cue to slow down before the storm arrives.

4. Know your own sore spots

Seneca pointed out that people don't all get angry at the same things. "This man wishes to be considered especially fashionable, that man to be thought especially learned: one cannot bear pride, another cannot bear obstinacy," he wrote. "People do not all take offence in the same way; you ought then to know what your own weak point is, that you may guard it with especial care" (3.10).

One person shrugs off criticism of their work but bristles at any comment about their parenting. Another is calm about almost everything except feeling ignored. Knowing which topics hit hardest makes it easier to spot when a reaction is bigger than the moment deserves.

Try finishing this sentence honestly: "I'm most likely to snap when someone…" Whatever comes to mind is probably the place where a little extra patience will matter most.

5. Don't argue when you're tired or hungry

Seneca knew that the state of the body affects the temper. "Hunger also and thirst should be avoided for the same reason; they exasperate and irritate men's minds," he wrote, adding an old saying: "a weary man is quarrelsome," and "so also is a hungry or a thirsty man, or one who is suffering from any cause whatever" (3.9).

He compared an irritated mind to a sore that hurts "at the slightest touch," so that even "a greeting, a letter, a speech, or a question" can provoke anger.

The practical version is easy to forget. If a difficult conversation can wait until after dinner, or until the morning, it often goes better. "I want to talk about this properly, but not right now. Can we pick it up tomorrow?" is a reasonable thing to say.

6. Laugh some things off

Seneca believed that "most things may be turned into jest." His favorite example was Socrates, who, when someone struck him on the ear, "merely said that it was a pity a man could not tell when he ought to wear his helmet out walking." Seneca also mentions Pisistratus, the ruler of Athens, who was insulted by a drunk dinner guest and said he was no more angry with the man "than he should be with one who ran against him blindfold" (3.11).

Humor works here because it takes the insult less seriously than the insulter hoped. It also gives you something to say that isn't a counterattack.

This doesn't apply to everything. Some remarks are cruel or harmful and deserve a serious response. But for small jabs, a light reply like "Noted" or "I'll take that under advisement" can end the exchange without either person losing face.

7. Don't meet anger with anger

Seneca also gave advice for dealing with someone else's temper. "To reprove a man when he is angry is to add to his anger by being angry oneself," he wrote. Instead, he suggested approaching an angry person "in different ways and in a compliant fashion" (3.40).

When someone is already heated, a sharp correction tends to escalate things, even if the correction is fair. Matching their volume or tone rarely helps either.

A calmer approach is to lower your own voice, slow down and acknowledge what you can: "I can see this has really upset you." The substance of the disagreement can usually wait until both people have cooled down.

8. Review your reaction afterward

Seneca describes reviewing his words and actions at the end of each day. Once the lamp was out, he would go over what he had said and done and notice where he had gone too far: "In that dispute you spoke too contentiously," he might tell himself, or "You reprimanded that man with more freedom than you ought" (3.36).

After a difficult exchange, ask yourself: What first set me off? Did pausing change my response? What would I do differently next time?

If you snapped, an apology may be the next useful step. If you handled it well, notice what helped. The aim is to learn something you can use when the next difficult moment arrives.

Cooling down isn't the same as letting everything go

Seneca took a harder line on anger than most people do today. He thought it should be eliminated, not just managed, and many modern readers see a place for anger as a signal that something is wrong. Waiting before you respond is compatible with either view.

Delay also shouldn't become a permanent way of avoiding problems. If someone keeps mistreating you, or if a wrong needs to be addressed, the point of cooling down is to respond well, not to stay silent indefinitely. And if anger regularly feels overwhelming or leads to actions you regret, talking to a doctor or counselor can help.

One place to start

Pick a waiting period you'll use the next time something stings: ten minutes for a conversation, an hour for a message, a night for anything big. Decide on it now, while you're calm. Treat these waiting periods as starting points. If you're still worked up when the time is up, give yourself longer.

When the moment comes, use it. As Seneca put it, even if the delay gains you nothing else, what you do afterward will be "the result of mature deliberation, not of anger."