Why would anyone want to be despondent? Maybe if we all had to get evaluated regularly with our mental health like we do with our physical health.. maybe just maybe... we wouldn't be as sick, on all ends.
Those who are successful already tell themselves these things. They already believe it. I use the example, say someone hands you a puzzle, one of those brain teasing 3 dimensional puzzles, and says, "I think it has all the pieces". You may spend some time trying to put it together and if it gets too difficult you may say, "It must be missing some pieces.. this isn't working", but if they tell you that all the pieces are there you will be more willing to put in the extra effort because you know that it is solvable. Then there are others that will keep trying till it works regardless. If you are sure that you can do something you are more likely to accomplish your goal.
It has been proven that our thoughts create chemical reactions in our brain. If we think thoughts that stress us out our glands secrete cortisol... also known as the "fight or flight" hormone. If we think sad, depressing thoughts that stress us out our hormone levels spike and we physically feel all of the symptoms that correlate.
We treat drug addicts like criminals.. and believe that even criminals should be allowed guns... and yet.. no one wants to help any of these people. I'm not even talking about politicians. They are a small part of what this country is made up of. We need to start making changes ourselves. We need to start thinking about ALL of our citizens. We need to think about addicts... and the school children who have to practice safety measures in case of shootings. We need to think about the lives that we are leaving our children.