Assertiveness for Nice People: Why Do We Feel Guilty When We Say “No”?

Have you ever been in a situation that needed you to be firm, maybe even a little harsh, but you just couldn’t?

It’s not because you’re weak.

Sometimes it’s because you were raised with a certain idea of love.

Some of us grew up with an unspoken equation:

Be obedient… and you’ll be loved.

Be nice… and we’ll approve of you.

Not every upbringing is like this.

But if you grew up in that climate, you may live with a strange conflict: you can be kind, polite and cooperative, but when it’s time to say “no,” you feel guilty.

Why?

Because assertiveness was never built in you as a skill. It was built as a danger: the danger of losing love, an image, or acceptance.

So you stay quiet. You give in. And at night you ask yourself: “Why didn’t I say something?”

The problem isn’t that you don’t know how to speak.

The problem is that you never got used to speaking this way.

And here is the core idea: assertiveness isn’t aggression, and it isn’t tearing relationships down. It’s clear boundaries, without disrespect.

But What Is Assertiveness, Really?

In 1970, Robert Alberti and Michael Emmons published the first book on assertiveness training written for the general public. Their definition is still used today: assertiveness is acting in your own best interest, standing up for yourself, and expressing your feelings, without denying the rights of others.

You can picture it as a line with two ends and a middle:

• Passivity: You agree when you don’t, and swallow your irritation.
• Aggression: You stand up for yourself in a way that hurts or humiliates.
• Assertiveness: You say what you want clearly, and respect the other person at the same time.

Example: Haider’s colleague asks him, for the fourth time, to cover his shift.

The passive reply: “No problem,” while he’s boiling inside.

The aggressive reply: “You always take advantage of people.”

The assertive reply: “I can’t this time, I have a commitment.”

A nice person doesn’t need to give up being nice to become assertive. They just need to add clarity to their kindness.

Where Does the Guilt Come From?

The equation we started with, “be obedient and you’ll be loved,” has a name in psychology: parental conditional regard. It’s when parents give love and warmth when the child behaves the way they want, and withdraw it when the child doesn’t.

In two studies published in 2004, researchers Avi Assor, Guy Roth and Edward Deci asked university students about their experience with their parents. Those who felt their parents’ love was conditional did comply more with the expected behavior, but out of internal compulsion, not conviction. And it came at a price: brief satisfaction after success, shame and guilt after failure, self-esteem that swung up and down, and resentment toward their parents.

Strikingly, mothers who had experienced this style with their own parents were, according to their daughters’ descriptions, more likely to use it with them.

These are correlational studies based on what participants report, so they don’t prove that everyone raised this way will be unable to say “no.” But they explain that familiar feeling: that saying no isn’t just a word, it’s a risk to love itself.

And this doesn’t mean our parents are bad people. Many of them raised us the way they were raised, with the best of what they knew.

We Overestimate the Cost of “No”

The good news is that the danger we imagine is usually bigger than the real one.

In research published in 2023, Julian Givi and Colleen Kirk found that more than three quarters of participants in a preliminary study had accepted an invitation to an activity they didn’t want to do, out of fear of the consequences of saying no. They then ran five experiments with more than two thousand people: those who imagined turning down a friend’s invitation expected more anger and disappointment than the friend actually felt. The same thing happened between couples.

Givi sums up the finding by saying that the negative consequences of saying “no” are far less severe than we expect.

The research is specifically about invitations, not every kind of request. But it reveals a general tendency: we inflate how others will react when we turn them down.

Assertiveness Is a Skill Built Through Repetition

I like to compare assertiveness to a muscle: it doesn’t build up all at once, it builds through repetition.

And that comparison isn’t far from what the research says.

In a 2018 review, researchers Speed, Goldstein and Goldfried describe assertiveness training as “a forgotten evidence-based treatment.” Its core tools are simple: rehearsing out loud and role-playing the situation, watching a model of an assertive response, getting feedback, then applying it in everyday life.

The authors note that in several studies this training was linked to lower anxiety and better self-esteem. And they point out that rehearsal works as a kind of exposure: the more you repeat the situation you fear, the less you fear it.

But they admit that most of this evidence dates from the 1970s to the 1990s, and that recent research is scarce. So it’s good evidence, not conclusive evidence.

At its core, assertiveness is the ability to tolerate a short moment of tension to protect yourself in the long run.

When Does Assertiveness Turn Into Something Else?

Assertiveness isn’t raising your voice, and it isn’t refusing everything.

In a well-known study of leaders (Ames & Flynn, 2007), people whom their colleagues saw as very low in assertiveness and people they saw as very high in it were both rated as less effective leaders. The first lose results because they don’t stand up for their interests; the second lose relationships because they push harder than they need to. As the two researchers sum it up: the best leaders push hard enough to get what they want, but not so hard that they can’t get along with others.

So a few caveats:

• Not every “no” is necessary: Even Givi himself advises against turning down every invitation, because time spent together is what builds relationships.
• Context matters: In our societies, too much directness can come across as disrespect. Smart assertiveness chooses its tone and its setting, and prefers a private conversation.
• Assertiveness isn’t the answer to everything: If you’re in a relationship involving abuse or threats, it’s a matter of safety and support, not of finding the right sentence.
  

How Do You Start? Small Steps

The answer isn’t for me to suddenly tell you: “Be strong.” It’s gradual.

1. Memorize three ready-made sentences. Example: “No, that doesn’t work for me,” “I need time to think,” “I respect you, but I don’t agree.”
2. Start with small situations. Example: Tell the salesperson who keeps pushing: “I’ll think about it and come back,” and leave calmly.
3. Practice with someone you trust. Example: Huda asks her friend to play the role of her manager, who piles extra work on her desk every Thursday, and tries responding out loud.
4. Buy time before the automatic “yes.” Example: When a relative asks you for a big favor over the phone, say: “Let me check my schedule and get back to you this evening.”
5. Watch what actually happens after you say no. Example: After you excuse yourself from an occasion, notice: did the relationship really end, or was it one awkward minute that passed?
   

A Simpler Mental Model

• Kindness is what you offer people.
• Assertiveness is how you protect yourself and the people you love.
• The two don’t conflict: you don’t have to choose between being good and being clear.
• And assertiveness is like a muscle: it’s built through repetition, not by a single decision.

Assertiveness doesn’t make you a different person.

It makes you the same kind person, just with a voice that’s heard.

Every small “no” you say calmly makes your next “yes” more honest.

Ask yourself today: What sentence most needs to be said in my life… that I keep putting off?

Then write it down. That’s the first step.

Further Reading

• The Emotional Costs of Parents' Conditional Regard: A Self-Determination Theory Analysis — Assor, Roth & Deci, Journal of Personality, 2004: The two studies that linked parents’ conditional love to internal compulsion, guilt and unstable self-esteem.
• Just Say No to That Invitation — ScienceDaily / American Psychological Association, 2023: A summary of Givi and Kirk’s research on how we overestimate how upset others will be when we turn down their invitations.
• Assertiveness Training: A Forgotten Evidence-Based Treatment — Speed, Goldstein & Goldfried, Clinical Psychology: Science and Practice, 2018: A review of the history of assertiveness training, its tools and the evidence for its benefits, along with the limits of that evidence.
• What Breaks a Leader: The Curvilinear Relation Between Assertiveness and Leadership — American Psychological Association, 2007: Why a leader low in assertiveness loses results, while one high in assertiveness loses relationships.