But Thamus replied, " Most ingenious Theuth, oneman has the ability to beget arts, but the ability tojudge of their usefulness or harmfulness to their usersbelongs to another ; and now you, who are the fatherof letters, have been led by your affection to ascribeto them a power the opposite of that which theyreally possess. For this invention will produce for-getfulness in the minds of those who learn to use it,because they will not practise their memory. Theirtrust in writing, produced by external characterswhich are no part of themselves, will discourage theuse of their own memory within them. You haveinvented an elixir not of memory, but of reminding ;and you offer your pupils the appearance of wisdom,not true wisdom, for they will read many thingswithout instruction and will therefore seem to knowmany things, when they are for the most part ignorant
and hard to get along with, since they are not wise, but only appear wise." pp 563-564