"The only time you mustn't fail is the last time you try"

This quote by Charles F. Kettering is a reminder to never quit. It motivates us to keep trying, even when we seem like we have stopped working. It recommends that we must never quit, no matter how many times we have tried and failed. It indicates that the last time we try ought to be our best effort, and that we ought to never give up till we have attained our objective. This quote is a reminder that failure is not the end, however rather a stepping stone to success. It encourages us to keep pressing forward and to never ever quit, no matter how many times we have actually stopped working. It is a reminder that the only time we need to not stop working is the last time we attempt.