The Germans, in the age of Tacitus, were unacquainted with the use of letters; and the use of letters is the principal circumstance that distinguishes a civilised people from a herd of savages incapable of knowledge or reflection. Without that artificial help, the human memory soon dissipates or corrupts the ideas intrusted to her charge; and the nobler faculties of the mind, no longer supplied with models or with materials, gradually forget their powers; the judgment becomes feeble and lethargic, the imagination languid or irregular.