Even for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached.
Werner HeisenbergThe Same organizing forces that have shaped nature in all her forms are also responsible for the structure of our minds.
Werner Heisenberg...separation of the observer from the phenomenon to be observed is no longer possible.
Werner HeisenbergModern physics has changed nothing in the great classical disciplines of, for instance, mechanics, optics, and heat. Only the conception of hitherto unexplored regions, formed prematurely from a knowledge of only certain parts of the world, has undergone a decisive transformation. This conception, however, is always decisive for the future course of research.
Werner Heisenberg