Success represents the 1% of your work which results from the 99% that is called failure.
Even when you have doubts, take that step. Take chances. Mistakes are never a failure - they can be turned into wisdom.
FAILURE, MISTAKES ARE NEVER A FAILURE
If you're not failing every now and again, it's a sign you're not doing anything very innovative.
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.
The great question is not whether you have failed, but whether you are content with failure.