Assent: How to Stop Saying Yes to Your First Impression
Introduction
It is eleven o'clock at night when a work message lights up your phone: "First thing tomorrow morning, I need to talk to you." It does not say what about. In less than a second, your mind has already written the entire script: something went wrong, you are going to be reprimanded, maybe even fired. Your pulse quickens, sleep evaporates, and at two in the morning you are still rehearsing arguments to defend yourself against an accusation nobody has made.
The Stoics had a precise name for what happened in that split second. The message triggered an impression (phantasia): a mental image loaded with meaning ("this is a threat"). And you, without realizing it, gave it your assent (synkatathesis): you signed off on it as true. Everything else—the insomnia and the midnight courtroom rehearsals—followed from that signature.
An impression is not an order. It is a proposal your mind puts on your desk, and you can inspect it before signing.
For Epictetus, training the faculty of assent was the finest and most decisive part of Stoic practice. This article explains how it works and how to practice it in everyday life.
Three Steps That Usually Blur into One
Stoic psychology distinguished three distinct moments that, in ordinary experience, fuse into a single flash:
1. The impression. Something pops into the mind: an image, an idea, an automatic interpretation. "This message means trouble." We do not choose it; it arrives uninvited. 2. The examination. The brief window in which we can inspect that impression: is it accurate? What is actually verified here, and what am I adding? 3. Assent or rejection. We accept the impression as true, reject it as false, or suspend judgment until we have more information.
Most of the time, the second step is skipped entirely: the impression arrives and we swallow it whole, along with all the extra baggage attached to it. Stoic training consists in recovering that second step—opening a small space between what the mind proposes and what we choose to believe.
Epictetus's Formula for Stopping an Impression in Its Tracks
The Enchiridion offers a remarkably concrete instruction. Whenever a harsh impression hits, Epictetus advises, get into the habit of saying to it right away: "You are just an impression, and not at all what you claim to represent." Then examine it and test it by the rules you have—above all by this first and most important rule: does it concern things that are up to me, or things that are not up to me?
It sounds simple, yet that short sentence accomplishes two things at once. First, it strips the impression of its disguise as indisputable reality, turning it into a mental object you can look at rather than through. Second, it activates the question that organizes all of Stoic ethics: the dichotomy of control.
In the Discourses, Epictetus goes a step further and speaks to the impression as if it were a stranger knocking at the door: "Wait a moment for me, impression; let me see what you are and what you represent; let me put you to the test." The point is not to slam the door without listening, but to refuse to let it barge into the house without checking its credentials.
Why First Impressions Are So Deceptive
Impressions rarely arrive naked. They come bundled with three add-ons that you need to learn to peel apart:
- A value judgment. Not merely "a message arrived," but "a bad message arrived."
- A prediction. "I'm going to get fired."
- A sense of urgency. "I have to do something right this second."
All three are questionable. The message itself may be neutral, the prediction almost never has solid evidence behind it, and the urgency is usually false: very few situations in life require an instant reaction at eleven at night. When you give your assent to the raw impression, you sign off on all three add-ons without reading the fine print.
Everyday Examples
The aggressive email. A client writes in all caps with three exclamation marks. Impression: "He is attacking me and I need to put him in his place." Examination: a client is upset about a specific issue. What is up to you is understanding the issue and replying professionally; his manners are not up to you. Practical response: wait half an hour and reply to the substance of the problem, ignoring the tone.
The social media comment. Someone leaves a snarky critique on something you posted. Impression: "This is humiliating; everyone is reading it and laughing." Examination: one person typed an opinion. How many people saw it and what they thought about it are things you neither know nor control.
The bank alert. "Unusual activity detected on your account." Impression: "My life savings have been stolen." Examination: there is a security alert that needs checking. What is up to you is opening your official banking app or calling the number printed on the back of your card—never clicking the link inside the text message. Here, pausing to examine the impression does more than calm your nerves: it protects you from phishing scams designed to exploit panic.
The 11 p.m. message from your boss. Impression: "I'm in serious trouble." Examination: someone wants to talk tomorrow morning; I do not know the topic yet. What is up to me tonight is getting to sleep so I show up rested. The rest will be clear in the morning.
How to Train It Without Burning Out
Assent is trained like a muscle: you start with light weights. Trying to scrutinize every single impression all day long is exhausting and unrealistic. A more practical training plan looks like this:
1. Pick one small arena. For example, text messages and emails. For one week, whenever a message spikes your heart rate, apply Epictetus's phrase before typing a reply. 2. Insert a physical pause. Take two slow breaths, set the phone face down on the table, or stand up for a moment. The physical pause buys time for the mental examination. 3. Label the impression. Quietly to yourself or on paper, say: "I am having the impression that this is an attack." The phrase "I am having the impression that..." immediately separates what you are thinking from what is actually happening. 4. Ask the control question. What part of this situation is actually up to me? 5. Decide what gets your signature. Give your assent only to what survives inspection ("My boss sent a message asking to meet tomorrow") and suspend judgment on the rest ("I'm about to be fired").
Over time, this inspection gets faster and starts kicking in automatically during tougher moments. That is the real sign of progress.
Common Mistakes
- Turning examination into rumination. Inspecting an impression takes seconds or a couple of minutes. Turning it over in your head for three hours is just another way of being captured by it.
- Rejecting every unpleasant impression. Some impressions are completely accurate: if the departure board says your flight is canceled, it is canceled. The goal is not denial; it is refusing to pile catastrophic fiction on top of the facts.
- Expecting to feel no initial jolt. The first startle reflex is involuntary—even the Stoic sage turns pale in a storm at sea. What you train is what happens in the second after the jolt.
- Practicing only in theory. Reading about Stoic assent does not build the reflex. You build it on the very next tense message that lands in your inbox.
Conclusion
Epictetus never asked us to control what pops into our minds; nobody can do that. He asked for something much more achievable: stop signing documents without reading them first. Over the next seven days, whenever a phone notification or message rattles you, pause before replying and write down one sentence starting with "I have the impression that..." and a second starting with "What is up to me right now is...". At the end of the week, count how many times your frightening first impression turned out to be the whole truth. It will almost certainly be far fewer than you thought.
References
- Epictetus. Enchiridion, 1.5.
- Epictetus. Discourses, II.18 ("How we should struggle against impressions").
- Hadot, P. (1998). The Inner Citadel: The Meditations of Marcus Aurelius. Harvard University Press.
- Robertson, D. (2019). How to Think Like a Roman Emperor: The Stoic Philosophy of Marcus Aurelius. St. Martin's Press.
- Sellars, J. (2019). Lessons in Stoicism. Allen Lane.
- Vázquez, M. (2019). Invicto: Logra más. Sufre menos. Fitness Revolucionario.