Whatever we undertake, we should say, "I shall accomplish it, or lose my life." Failure comes from lack of confidence, lack of confidence comes from doubt, doubt comes from reasoning, and reasoning comes from thinking of the means. If you think, "I will go to Brighton, but perhaps, if I do, the Zeppelins will come and I shall be killed", then you lose your confidence. There was no need to think of the Zeppelins. They might come, but if they came you would be one among the many inhabitants of Brighton, and you might not be killed.