“They say that genius is an infinite capacity for taking pains," he remarked with a smile. "It's a very bad definition, but it does apply to detective work.”
“Genius is an infinite capacity for pain.”
“Genius is an infinite capacity for causing pain.”
“I saw that Haller was a genius of suffering and that in the meaning of many sayings of Nietzsche he had created within himself with positive genius a boundless and frightful capacity for pain.”
“Genius is play, and man's capacity for achieving genius is infinite, and many may achieve genius only through play.”
“Genius is seldom recognized for what it is: a great capacity for hard work.”