When the old man waggles his head and says, “Ah, so I thought when I was your age,” he has proved the youth’s case. Doubtless, whether from growth of experience or decline of animal heat, he thinks so no longer; but he thought so while he was young; and all men have thought so while they were young, since there was dew in the morning or hawthorn in May; and here is another young man adding his vote to those of previous generations and riveting another link to the chain of testimony.

Ralph Waldo Emerson (1803-1882) American essayist, lecturer, poet

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

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