I don't believe in failure
Failure is more frequently from want of energy than want of capital.
FAILURE, ENERGY THAN WANT OF CAPITAL
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
Failure is simply a few errors in judgment, repeated every day.
FAILURE, FEW ERRORS IN JUDGEMENT
If you're not failing every now and again, it's a sign you're not doing anything very innovative.