deekay replied to JulyDiaz's topic in The Cracked PodcastRE: Einstein's "insanity" quote. "The definition of insanity is doing the same thing over and over again and expecting different results." While it's probably not something he ever said, I really don't think it has anything to do with mental health. Einstein was an outspoken critic of the probablistic nature of quantum theory (despite his work on the photoelectric effect making him a pioneer in the field). In other words, he was a staunch determinist. It makes much more sense to me that this is along the same lines as "God does not play dice with the universe." because in quantum mechanics, you really can do the same thing over and over and expect different results.