It's an experience like no other experience I can
describe, the best thing that can happen to a scientist,
realizing that something that's happened in his or her mind
exactly corresponds to something that happens in nature. It's
startling every time it occurs. One is surprised that a
construct of one's own mind can actually be realized in the
honest-to-goodness world out there. A great shock, and a
great, great joy.
-- Leo Kadanoff
