Cheerfulness enhances the quality of life and improves productivity. A positive outlook makes one upwardly mobile.
A cheerful disposition naturally reaches out to help someone. This person is not sticking out his neck. He knows he is doing something within reach. He knows he is capable. He simply reaches out, achieves the purpose and continues with his course. He radiates life and all the issues that make life happy and purposeful.
It is difficult to say if strengths outweigh weaknesses. If it was so easy for strengths to outweigh weaknesses, almost everybody would be happy. Even the happiest people go through bouts of depression and anxiety. However, happy people have the resilience to bounce back. They do not carry forward their depressions to another day. As a matter of fact, going through depressions and anxieties improve resilience. They make a person stronger. It is mentioned that for every 17 articles on negative emotions such as anxiety and depression, there was only one article that dealt with the emotion of joy (Happiness).
Basically, it is hope that drives man to live on. As long as man has life, he also has hope. Irrespective of his constant state of mind, there is the urge within man to press on. He knows better days are ahead. Even the most hardened skeptic harbors the notion that there is the silver lining. In the ultimate analysis, one has to learn to live above factors that make for weaknesses.