I used to think I wanted to write books to be famous. Then I used to think I wanted to write songs that made the whole world sing. Next I thought I wanted to write movies that won me Oscars. Or TV shows that won Emmys.
I came to believe I really wanted to write books that made people think. Until finally, I realized I just wanted to write books that made me think.
When you finally find out what it is you really want to do, and why you want to do it, the sunglasses come off and you truly see the luscious panorama around you. You have discovered your assignment. Or perhaps more accurately, your assignment has discovered you.
Either way you win. And so does the world.