FAILURE
Once you start a working on something, don't be afraid of failure and don't abandon it. People who work sincerely are the happiest.
The great question is not whether you have failed, but whether you are content with failure.
We climb to heaven most often on the ruins of our cherished plans, finding our failures were successes.
You can't be afraid of failure and you can't be afraid of success, because either one gets in the way of your work.