So, there are those who are happy because of their life and those who are happy despite their life, but the truth is simple.
1. Your glass is never empty, life always gives you something to build on. Never make the error of ignoring this and feeling otherwise.
2. The things you did not get in life could be a wonderful opportunity. If your life misses something, you can fill that part with anything you want. All you need is the courage to take risks and a little bit of imagination.
If God had filled all our glasses to the brim, what fun would there be in living?