The best chance of enjoying enhanced cognitive skills is to fall in love with ideas, or intelligent conversation, or intelligent books, or some intellectual pursuit. If I do that, I create within my own mind a stimulating mental environment that accompanies me wherever I go. Then I am relatively free of needing good luck to enjoy a rich cognitive environment. I have constant and instant access to a portable gymnasium that exercises the mind. Books and ideas and analyzing things are easier to transport than a basketball court. No one can keep me from using mental arithmetic so habitually that my arithmetical skills survive.

James R. Flynn, What is intelligence? Beyond the Flynn effect, Cambridge, 2007, p. 87