Genius or Madness?

"Great wits are sure to madness near allied, and thin partitions do their bounds divide." (Dryden)
Lecture of The Psychology of Creativity from Professor Glenn D. Wilson. Topic is Genius or Madness?
The transcript and downloadable versions of all of the lectures are available from the Gresham College website: http://www.gresham.ac.uk/lectures-and-events/genius-or-madness