Edgar Allan Poe, 1809-1849
was an US short story author, editor, and poet
I do not suffer from insanity, I enjoy every minute of it.
Oliver Wendell Holmes, 1809-1894
was an US author and physician
Insanity is often the logic of an accurate mind overtaxed.
Albert Einstein, 1879-1955
was an US (German-born) physicist
Insanity: doing the same thing over and over again and expecting different results.
( attributed )