Ian Fleming said this quote
“ He had seen how the spirit, the reserves in [Bond], could pull him out of badly damaged conditions that would have broken the normal human being. He knew how a desperate situation would bring out those reserves again, how the will to live would spring up again in a real emergency. He remembered how countless neurotic patients had disappeared for ever from his consulting rooms when the last war had broken out. The big worry had driven out the smaller ones, the greater fear the lesser. He made up his mind. He turned back to M. Give him one more chance. ”