Its all about keeping yourself happy

In life, we do face a lot of problems, some of them we overcome, some of them we are scared to face again. But when we look at the bigger prospective, its all about staying happy and conquering all the problems. That way, you can show the world that you have a positive attitude and you are not afraid to face any kind of problems. The more you face problems, the more you become tougher, both mentally and physically. This realization has crept into my mind of late. What you say?