13 things mentally strong people don't do

Navy SEALs possess extraordinary mental toughness.Getty

Mental strength isn't often reflected in what you do. It's usually seen in what you don't do.
In her book "13 Things Mentally Strong People Don't Do," Amy Morin writes that developing mental strength is a "three-pronged approach." It's about controlling your thoughts, behaviors, and emotions.
Following are 13 things that mentally strong people do not do, Morin says.
This is an update of an article originally written by Steven Benna.

1. They don't waste time feeling sorry for themselves.

 

Instead, they express gratitude.Getty Images/NBCUniversal

"Feeling sorry for yourself is self-destructive," Morin writes. "Indulging in self-pity hinders living a full life." It wastes time, creates negative emotions, and hurts your relationships.
The key is to "affirm the good in the world, and you will begin to appreciate what you have," she writes. The goal is to swap self-pity with gratitude.