Have you've even been Happy-Sad. That's a time when you are happy despite sad circumstances in your life.
You're sad when you're children have left home for good but happy to come home to a beautifully clean home.
You're happy that you're no longer in school but your sad because you no longer have an achievement to aim for.
That's all Happy-Sad; experiencing both emotions almost simultaneously.
The next time that you're in that Happy-sad moment hang on to the Happy if you can; picture it, feel it, embody it so that you can recall that Happy memory in times of sadness, it will feed your soul.
Live On Purpose!