The structure underlying the phenomena is not given by material objects like the atoms of Democritus but by the form that determines the material objects. The Ideas are more fundamental than the objects.
Werner HeisenbergWhenever we proceed from the known to the unkown we may hope to understand, but we may have to learn at the same time a new meaning of the word 'understanding'
Werner HeisenbergEven for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached.
Werner Heisenberg