I forgo happiness many times for the sake of self-improvement.
Happiness is a mindset, not an external reward.
One thought that always comes to my mind, when I question the idea of happiness (and this is an exaggeration, but I tend to do that):
Whenever I think about happiness, I see how fleeting it is. You see it out of the corner of your eye, but as soon as you focus, it is gone. When I search for knowledge, or I seek improvement, I seemingly lose my ability to be happy. I get caught up in the trivialities, I let them affect me. It has been a long time coming; understanding that no one is responsible for my own feelings but myself.
To be happy, I have to allow things to be as they are; something the Tao Te Ching helped me with greatly. To learn acceptance and understanding while I am a ball of constant change.
How do you merge the two? Happiness and introspection. I don't think it is possible without introducing bias. Of course, if you are happy with how things are, then what is the point of introspection? I was happy when I drank (a lot) I really didn't care to learn more, nor did I care much about anything, my life was pretty hollow, but it wasn't very hard to make me happy.
Now I have all this clutter, philosophy, psychology, science, etc, etc. This clutter gets in my way of being happy. I get serious, concerned, passionate, and happiness is not my passion. The only thing that even closely resembles happiness is my bucket loads of cynicism I develop (more catered towards ironies and incompetence rather than general negativity), which is quite apparent at work.
Is it possible to merge a passion with happiness?
Am I wrong in defining happiness as a contentment with everything? And if one is content, then why seek change?
And if all I want is contentment, then why don't I just go get a damn lobotomy?