"Her virtuosity resided in her capacity to observe, and to process and interpret what she observed. As she grew older, it became less and less possible to delegate any part of her work; she was developing skills that she could hardly identify herself, much less impart to others. /The nature of insight in science, as elsewhere, is notoriously elusive. And almost all great scientists--those who learn to cultivate insight--learn also to respect its mysterious workings. It is here that their rationality finds its own limits. In defying rational explanation, the process of creative insight inspires awe in those who experience it. They come to know, trust, and value it."- Evelyn Fox Keller about Barbara McClintock