If someone, 20 years ago, would have said to you that you would be where you are today – would you have taken it? If so, then you have a lot to be grateful for.
If not, then review what has happened in your journey? Did something happen to you which was beyond your circumstances? Did you lose discipline and focus? Can you apply the learning going forward so you can course correct?
When you count your blessings (in success and/or in failure), your blessings multiply. When you believe in your ability to bounce back bigger and stronger no matter what, your ability to succeed expands. When you turn your tragedy into opportunity, your opportunities grow. At the end of the day, it is all about maintaining a positive attitude.
Happiness is not a set of circumstances. Happiness is a set of attitudes!