In Print Quotes (page 3)
In the week I promised myself I should naturally read, for to the habitual reader reading is a drug of which he is the slave; deprive him of printed matter and he grows nervous, moody, and restless; then, like the alcoholic bereft of brandy who will drink shellac or methylated spirit, he will make do with the advertisements of a paper five years old; he will make do with a telephone directory.
W. Somerset Maugham