Passion is a rather frightening thing because if you have passion you don't know where it will take you.

When it’s all said and done, will you have said more than you’ve done?

When you're on your deathbed, you won't be wishing that you'd spent more time at the office.  But you will be wishing that you'd spent more time running.  Because if you had, you wouldn't be on your deathbed.