Man is a creature who lives not upon bread alone, but principally by catchwords; and the little rift between the sexes is astonishingly widened by simply teaching one set of catchwords to the girls and another to the boys.

Robert Louis Stevenson (1850–1894) Scottish essayist, novelist, poet

Essay (1881), “Virginibus Puerisque, Part 2”
    (Source)

Playing off of the Biblical passages Luke 4:4 and Matthew 4:4, in turn from Deuteronomy 8:3.

First published in Virginibus Puerisque and Other Papers, ch. 1, part 2 (1881)