My recollection is that he stated it perhaps better, perhaps earlier in the preface to his book on the common law where he said, I think, " The life of the law has been not logic but experience."
Recuerdo que quizás lo expresó mejor, y quizás antes, en el prefacio de su libro sobre la ley común cuando dijo, creo, "La vida de la ley no ha sido la lógica, sino la experiencia".