Creative Quotations from . Every word or concept, clear as it may seem to be, has only a limited range of applicability.
Every tool carries with it the spirit by which it had been created.
An expert is someone who knows some of the worst mistakes that can be made in his subject and how to avoid them. Even for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached. Scroll down for sources of quotations and special search engines. See also CQ's recommended links to biographical websites Heisenberg Search the Web.