In short, if youth is not quite right in its opinions, there is a strong probability that age is not much more so.

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

Essay (1878-03), “Crabbed Age and Youth,” Cornhill Magazine, Vol. 37
    (Source)

Collected in Virginibus Puerisque and Other Papers, ch. 2 (1881)