"The mind can atrophy, like the muscles, if it is not used. Atrophy of the mental muscles is the penalty that we pay for not taking mental exercise. And this is a terrible penalty, for there is evidence that atrophy of the mind is a mortal disease."
- Mortimer J. Adler
& Charles Van Doren
Mortimer J. Adler & Charles Van Doren, How to Read a Book (New York, NY: Simon & Schuster, Inc., 1972), p. 345.
[HT: Ken Samples]