Having a positive mindset cant hurt you for the most part I would say unless you have some grandiose unrealistic expectations about life. Also it cant hurt to have some negativity as that would make you more neutral and
objective to the things that occur in your life. In essence, too much of one thing can be bad and we need to strive for a balanced mindset (perhaps leaning a bit more towards positive thoughts)
Agreed. You can't be positive all the time but at the same time you MUST see yourself as a great person, no matter what people say about you. Some people seem to live to bring you down with them and that's the people you need to get away from you. I've had to cut siblings completely out of my life that can't seem to help themselves. Cutting off those 'crabs in a bucket' types and replacing them with positive influences has made the biggest difference on looking at myself and my accomplishments in a positive way.