In the end it all comes down to this: you have a choice (or more accurately a rolling tangle of choices) between giving your work your best shot and risking that it will not make you happy, or not giving it your best shot -- and thereby guaranteeing that it will not make you happy. It becomes a choice between certainty and uncertainty. And curiously, uncertainty is the comforting choice. 

- Ted Orland

Actually, ambition won't get you that far. You'll shift gears. You'll see something that's shinier. But, if you believe—then you're the long-distance runner. 

- Sam Abell

In wisdom gathered over time I have found that every experience is a form of exploration.

- Ansel Adams