The lightest and swiftest things are horses; but they run for man. A dog is a fierce and an angry animal; but it guards man. Fish is the sweetest thing, and swine the fattest; but they are man's nourishment and cheer. What is bigger than an elephant? But this also is become man's plaything, and a spectacle at public solemnities, and it learns to skip, dance, and kneel. Such things as these are not introduced in vain, but that we may learn by them whither knowledge advances man, and above what things it sets him, and how he comes to be master, and exceed all other things.
-- The Greek historian Plutarch, from a 1905 translation of his Morals (p. 476).