HakunaMatada: By the way, the Gra’s greatness was not in his lack of sleep. Nor was he the first to do that. One of the famous philosphers (Hobbes or Locke, I think) was said to sleep for 30 minutes every 6 hours. There is a modern innovation called the Uberman sleep schedule which says to sleep for 20 minutes every 4 hours. Studies are being done on it, but it seems there have been incidents of people doing it long-term with minimal adverse side-effects.
The Gra’s greatness was his dedication to and level of learning, not his lack of sleep.