Suffering is Joy?

As I was going through all of the posts on this blog, and trying to label each blog entry concerning it's topic, something came across my mind. Why is it that so many of my entries are so unhappy? Is it that I am an unhappy person at heart, despite my "bubblyness"? Is it possibly that I truly can't tap into the happy state of mind that I at least seem to put myself out as? I cannot even begin to enter the realm of being able to say "I am truly happy". Or can I? I suppose it would depend on your definition of happiness at first.
A friend of mine used to say that true happiness cannot exist, because when one is happy all the time, they forget sadness and it becomes non-existent for them. And with the philosophy that cold is only the absence of heat, one could state that happiness is only the absence of sadness. What if it was the other way around though? What if sadness is the absence of happiness?
Then this thought crossed my mind: "Why isn't the great question of happiness wildly discussed?"
The greatest philosophers in the history of all mankind have questioned happiness, why doesn't the common man? Great philosophers accepted sadness, and the common man questions it?
Perhaps those great philosophers have accepted the fact that sadness exists in our lives. If one is to dwell in their sadness they can never receive the joy from the things in life that give it out. The common man though searches to escape suffering... What if the key to our suffering is our suffering itself?
I don't write about my happy thoughts or feelings as often, because I am contented to stew in my joy and hold onto it for as long as I can. When I am sad... I write to try and push all that sadness out of me, and to get past that sadness to reach my joy. To try and turn fortune's wheel a little bit faster. I, like the rest of society, don't want to suffer. Yet these great thinkers among men have accepted their suffering and lived perfectly wonderful lives. In a sense, because they were doing what they wanted to do, they were happy.
When we suffer, we appreciate those happy moments more. When we are happy those suffering moments are all the more distant. Most definitely not similar to a state of balanced equilibrium, chemically speaking. So maybe those philosophers do have it right. Maybe we were made to suffer, so that happy moments are all the better for us. Like yin and yang, you can't have one without the other. You cannot be happy if you have never been sad. You cannot feel joy if you have never suffered.
So perhaps it is this, for you my readers. It is not that I am not a happy person. It is not that I can't tap into the happy parts of myself when I write. It is not that I am a young girl obsessed with the drama of life. It is that when I am happy, I am at peace.