" It is said that Deucalion and Pyrrha created men by throwing stones over their heads behind them:— Inde genus durum sumus, experiensque laborum, Et documenta damus qua simus origine nati. Or, as Raleigh rhymes it in his sonorous way,— "From thence our kind hard-hearted is, enduring pain and care, Approving that our bodies of a stony nature are. "

― Henry David Thoreau , Walden