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.
Develop success from failures. Discouragement and failure are two of the surest stepping stones to success.
It's not necessary to fear the prospect of failure but to be determined not to fail.
FAILURE, IT'S NOT NECESSARY TO FEAR THE PROSPECT OF FAILURE
Failure is simply a few errors in judgment, repeated every day.
FAILURE, FEW ERRORS IN JUDGEMENT
Failure doesn't kill you... it increases your desire to make something happen.
FAILURE, IT INCREASES YOUR DESIRE TO MAKE SOMETHING
If you're not failing every now and again, it's a sign you're not doing anything very innovative.