Passion
Passion. It's a double edged sword. It can be used to achieve your wildest dreams and goals or it can make one very self destructive.
Its that feeling you get in your chest when you listen to Beethoven's 9th symphony and the vocals kick in. Its that feeling you get when you are hill training and your whole body is aching but you enjoy the pain... It's the excitement that comes with channeling the stress at work into whatever you are doing.
We should all do our best to find our passions and when we do never let the flame burn out.