This quote by William Frederick Book is a suggestion to never quit and to never let failure end up being a part of our lives. It is a reminder that failure is a part of life, however it needs to not be something that we accept as a typical part of our lives. Instead, we should aim to learn from our mistakes and use them as a method to grow and progress. We must never ever let failure end up being a routine, as it can cause a lack of motivation and a sensation of despondence. Rather, we must utilize failure as a way to learn and grow, and to progress versions of ourselves. We should never give up, and never ever let failure end up being a practice.
"A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms against himself. He makes his failure certain by himself being the first person to be convinced of it"