What Negative Thoughts Do to Your Brain
Written By James Clear
Let’s say that you’re walking through the forest and suddenly a tiger steps onto the path ahead of you. When this happens, your brain registers a negative emotion — in this case, fear.
Researchers have long known that negative emotions program your brain to do a specific action. When that tiger crosses your path, for example, you run. The rest of the world doesn’t matter. You are focused entirely on the tiger, the fear it creates, and how you can get away from it.
In other words, negative emotions narrow your mind and focus your thoughts. At that same moment, you might have the option to climb a tree, pick up a leaf, or grab a stick — but your brain ignores all of those options because they seem irrelevant when a tiger is standing in front of you.
This is a useful instinct if you’re trying to save life and limb, but in our modern society we don’t have to worry about stumbling across tigers in the wilderness. The problem is that your brain is still programmed to respond to negative emotions in the same way — by shutting off the outside world and limiting the options you see around you.
For example, when you’re in a fight with someone, your anger and emotion might consume you to the point where you can’t think about anything else. Or, when you are stressed out about everything you have to get done today, you may find it hard to actual start anything because you’re paralyzed by how long your to-do list has become. Or, if you feel bad about not exercising or not eating healthy, all you think about is how little willpower you have, how you’re lazy, and how you don’t have any motivation.
In each case, your brain closes off from the outside world and focuses on the negative emotions of fear, anger, and stress — just like it did with the tiger. Negative emotions prevent your brain from seeing the other options and choices that surround you. It’s your survival instinct.
Now, let’s compare this to what positive emotions do to your brain.
