[M]y delirium assumed the form of a particular mixture of depression
and worry... anxiety about the logical status of my... work. It was impossible
for me to distinguish among my pain and difficulty in breathing, the flapping
of the window curtain, and certain as yet unresolved points of the potential
problem on which I was working. I cannot say that the pain revealed itself as
a mathematical tension, or that the mathematical tension symbolized itself as
a pain: for the two were united too closely to make such a separation
significant. However, when I reflected on this matter later, I became aware of
the possibility that almost any experience may act as a temporary symbol for a
mathematical situation which has not yet been organized and cleared up. I also
came to see more definitely than I had before that one of the chief motives
driving me to mathematics was the discomfort or even the pain of an unresolved
mathematical discord. I even became more and more conscious of the need to
reduce such a discord to semipermanent and recognizable terms before I could
release it and pass on to something else.
- Norbert Wiener1