"Designing a fusion reactor in 1977 is a little like planning to reach heaven: theories abound on how to do it, and many people are trying, but no one alive has ever succeeded."
-- Technol. Rev., Dec 1976, p. 21, reprinted in the second edition of L. Ruedisili and M. Firebaugh, Perspectives on Energy. Quoted by Albert A. Bartlett, "Forgotten Fundamentals of the Energy Crisis," Am. J. Phys. 46(9), Sept. 1978.