If you fail at the large things it means you have not large ambitions. Concentration, focus – that is all. The aptitudes come, the tools forge themselves.
All the greatest men are maniacs. They are possessed by a mania which drives them forward towards their goal. The great scientists, the artists, the philosophers, the religious leaders – all maniacs. What else but a blind singleness of purpose could have given focus to their genius, would have kept them in the groove of their purpose? Mania, my dear Mister Bond, is as priceless as genius.