I can't say what his intent was when Bobby McFerrin wrote the song but despite everything the meaning is still the same. If there is nothing you can do about a situation, you need to look at it as an opportunity. The chance to change your life, and maybe better yourself as well as those you care about.
Why am I talking about this? What is the point? For the last few years I have been slowly getting better. I won't ever be cured of depression but thanks to one person's support its made a lot of stuff easier to deal with. There are lots of situations that will bring you down, but if you smile and try to make those you care about happy. Then everything will come around. There never is an guarantee but with patience and a smile you can brighten you darkest days and find something you will give you all to get to. The main thing is to look toward the future while you remain rooted in the present, the past will define you but there is no "you" until you are in the ground.
There is always something you will find to change your life.
