My personal mental obsessions and physical ailments are caused primarily due to my inner conviction that I will achieve greatness in life. Majority of my thoughts are based off of my analytical analysis and observations about the world around me and how I can become better than all that I see and this leads me to develop a type of ADD with my mind constantly at work. Im receiving physical ailments because of my sleepless nights and days, poor eating habits as I push my body into overdrive fueled by caffeine and entertainment in between time. All of this is because of my pursuit of success inspired by the dream that America instills in all who are willing to pursue it.
I find that when many people receive this "success" many if not most are still not happy and they pursue another goal. Since success is just a synonym in most peoples minds for happiness in actuality most "successful" people failed. Now my question is is it the thrill of the pursuit of happiness that keeps people going or is it that moment of happiness that motivates them?

Undealt with panic can be a motivation.
Rage and a sense of entitlement can also push one to excel.
Feelings of inadequacy not dealt with too.
There are many possible (and combinations of) motivations that drive people to be 'successful' many of whom regret the inner and outer compromises and inner and outer steamrolling they've made on the way there.
Not that you have to hurt yourself to be successful. The whole no pain, no gain is just one of the lies.
Most of the lies about success involve telling people to cut off parts of themselves. Many involve telling people what they must not feel.

Success is defined in many ways. One symbol I took with me from my days meditating underneath a giant tree in the park was this:

Trees are successful. The wind blows, they sway. They go this way, they go that way, when it gets cold they adapt to it by entering a hibernation mode, gathering their strength for spring and storms and heat and wind and rain, and the cycle continues.

They simply exist through adaptation, yet they are rooted in their foundation and never move throughout their entire existence. They don't have to work, they don't have families, they never have to experience anyone they know dying...

That's all we want. Just simply to exist without all of this want and bother, noise and tumult that surrounds us.

Happiness is being totally open to changing your attitudes and abandoning your habits, or better yet not forming any. Happiness is being rooted in what brought you here in the first place - two people who hopefully loved each other enough to actually want to bring you into this world to create a legacy that would live on when they die.