The great question is not whether you have failed, but whether you are content with 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
It's not a very high failure rate if you choose people that you really like the sound of.
FAILURE, IT'S NOT A VERY HIGH FAILURE RATE IF YOU CHOOSE PEOPLE
Failure is simply a few errors in judgment, repeated every day.
FAILURE, FEW ERRORS IN JUDGEMENT