The Let Them Theory by Mel Robbins

I finished this book in March 2026. I recommend this book 2/10.

Why you should read this book:

This is a good book for the person who really needs to hear the message: You can't control others, you have to let them be them, and then, you concentrate on being you. This would be much better as a podcast episode, and it didn't feel like the author put much effort into good writing.

Get your copy here.

🚀 The book in three sentences

1. You can't control others, so "Let Them" and then concentrate on yourself.

2. Understand that friends come and go

3. You can always go first, say hello, and introduce yourself.

📝 My notes and thoughts

• P56. There is a famous quote about life from Greek philosopher Epictetus, "It's not what happens to you, but how you react to it that matters." What does that mean? It means that your personal power is in how you react. Learning how to respond differently to the annoying and stressful situations every day will change your life. Right now, you're giving away all your power because you're wasting your time and energy on things that don't matter or you're burning up over things that are beyond your control. You have no idea how big a problem this is. I didn't either.

• P75. So let's summarize what you have learned about managing stress. Right now, you allow other people to create unnecessary stress in your life. The Let Them Theory teaches you to protect your energy by not allowing minor irritations to control your life, so you can focus on what truly matters.

  • Problem: Other people are going to do things all day that bother you, annoy you, or stress you out. It will happen. You can't control it. When you allow someone else's behavior to stress you out, you give other people power. That leaves you drained with no time and energy for yourself.

  • Truth: Your body's stress response is automatic. You will feel yourself getting annoyed. You will feel frustrated. You will feel the anger and agitation hit. You can't control the emotions that rise inside of you. But you can learn how to reset your stress response so your emotions don't hijack you.

  • Solution: Using the Let Them Theory, you protect yourself from the stress other people have been causing you. Your power is in controlling your response to the other person's behavior, to the annoying situation, and to the emotion that you feel.

• P80. This is where that ends. It's time to give people the freedom to think what they want. Let Them. It's time to set yourself free and Let Me make the small moves boldly and unapologetically that over time will transform your entire life. The Let Them Theory was a gigantic wake-up call for me. I know that I was worried about other people's opinions, but I had no idea how big a problem it was until I started saying Let Them. Let Them judge. Let Them disapprove. Let Them have their opinions. Let Them think bad thoughts. Let Them talk about me behind their back. Right now, you move through life with other people's opinions as your road map. You take the left or right turn based on what you anticipate other people might think or say, rather than making the turn you want to make. When you navigate your life trying to predict what people are going to think and say about you, you give your power away. Instead of overthinking every move you make, what if you just Let Them think whatever the heck they want to think? It's life-changing to free yourself of this burden. Remember the fundamental law of human nature: You can't control what other adults say, do, or think. Try to, and you'll regret it. The more you Let Them think what they want, the better your life gets.

• P106. The Let Them Theory teaches you how to stop giving other people's opinions power over your life, and it empowers you to live your life in a way that makes you proud of yourself.

  • Problem: You are giving other people's opinions too much power. When you let the fear of what people might think dictate your choices, you limit your potential and hold yourself back from pursuing what you truly want. This fear causes you to procrastinate, doubt yourself, become paralyzed by perfectionism, and, most importantly, give up on your dreams.

  • Truth: People will have negative opinions about you no matter what you do. It will happen. Let Them. You can't control it. Allowing someone else's opinion to distract or consume you is a waste of your time and energy.

  • Solution: When you Let Them think what they want, it gives you the freedom to do what you want. When you align your thoughts and actions with your values, you will be proud of yourself. And when you are proud of yourself, you won't care what anyone else thinks.

• P126. The Let Them Theory empowers you to take a step back when you or another adult is acting like a child.

  • Problem: You're allowing other people's emotional immaturity to have power over your life. You're allowing someone else's outbursts, guilt trips, and reactions to dictate your actions, leading you to constantly manage their emotions rather than focusing on your own. This means you're always prioritizing the emotional needs of others at the expense of your own happiness.

  • Truth: Other people's emotional reactions are not your responsibility to manage. You cannot control how others feel or respond, nor can you fix their emotional immaturity. Most adults have the emotional capacity of an eight-year-old, and you can't change that.

  • Solution: Using the Let Them Theory, you can stay in control even when an adult is acting like a child and having an emotional outburst. Make the right decision for you, even if they make other people upset. You maintain your power when you stop taking on the burden of others' emotions and act in a way that aligns with your values.

• P145. Bestselling author Jeff Walker always says, "Success is about putting in the reps." What's that mean? Simple: To be successful, to lose weight, to write a book, or to become a YouTuber, you have to show up every day and do the boring, irritating, and uncomfortable work. You've got to put in the reps. Think about any change you want in your life, like going to the gym. How do you build muscle? You show up every day, and you put in the reps. The famous quarterback Tom Brady recently said about success, "The truth is you don't have to be special. You just have to be what most people aren't: consistent, determined, and willing to work for it."

• P166. Interesting chapter about friendship being about timing.

• P180. Good section about The Habit of "Going First."

• P186. The Let Them Theory empowers you to stop expecting friendship to happen and to take responsibility for creating it.

  • Problem: The Great Scattering happened, and you didn't realize it. You have been approaching friendship the wrong way ever since. You have expected to be included. You have expected to be around your friends all the time. You have expected the text back. That expectation has led to feelings of disconnection, isolation, and uncertainty in approaching new and existing friendships.

  • Truth: There are three pillars of adult friendship: proximity, timing, and energy. It's your responsibility to understand these three pillars and adopt a flexible mentality and proactive approach to your friendships. You have so much power in your relationships, and some of your most favorite people are just waiting for you to go first.

  • Solution: Using the Let Them Theory, start creating connections without any expectations. You go first. Start saying hello to people around you and building that feeling of community wherever you live today. Sign up for that class. Create the book club. Send the text. One awkward conversation at a time, you will find your people. This approach empowers you to create the most incredible community around you, filled with friendships that are meaningful, supportive, and aligned with who you are.

• P217. People do well when they can. Not when they want to do well, but when they can. By asking all these open-ended questions, you might just discover that the person you love wants to do well, but they just don't think they can right now. It's not an issue of motivation. What's in their way is a lack of belief in their ability to change—they don't think they can.