"A pessimist sees the difficulty in every opportunity; An optimist sees the opportunity in every difficulty." - Winston Churchill
As people, we tend to have a natural tendency to think more negatively than positively. Perhaps it's trait inside us to keep us on the lookout for enemies?
Regardless for the origin of negative thinking, it's limiting our potential. This type of mentality uses all the energy on how to protect ourselves rather than how we can make ourselves better.
Most of us are no longer living in an environment where we have to be constantly be afraid dying the next moment, so let's focus on being more optimistic. Self doubt does more harm to our potential than other people ever could.
Why Do We Think More Negatively