If you're not failing every now and again, it's a sign you're not doing anything very innovative.

Failure is more frequently from want of energy than want of capital.

My great concern is not whether you have failed, but whether you are content with your failure.

The only real failure in life is not to be true to the best one knows.

The most important of my discoveries have been suggested to me by my failures.

Even when you have doubts, take that step. Take chances. Mistakes are never a failure - they can be turned into wisdom.

We may be personally defeated, but our principles never!

Success needs no explanation. Failure does not have one that matters.

Success and failure are both part of life. Both are not permanent.

Failure happens all the time. It happens every day in practice. What makes you better is how you react to it.