10. They don’t compare themselves to others.
Remember, the mentally strong are stingy with their time and energy. So why waste it on worrying about what others are doing? Feelings like jealousy and resentment aren’t just exhausting; they’re pointless.
Instead, they appreciate others and celebrate their accomplishments with them. This creates optimism — which is a win-win for everyone. According to a Harvard University study, a sense of optimism may be able to reduce the risk from dying of major causes, such as cardiovascular disease.