Physicist Quotes and aphorisms about ability Stephen Hawking Stephen Hawking Stephen Hawking Richard P. Feynman ,, Trying to understand the way nature works involves a most terrible test of human reasoning ability.... Richard P. Feynman Michio Kaku ,, Consciousness-one level is understanding where we are in space. Consciousness two is where we under... Michio Kaku Werner Heisenberg ,, Although the theory of relativity makes the greatest of demands on the ability for abstract thought... Lawrence M. Krauss Brian Greene