Diogenes said well to one who asked from him letters of recommendation, “That you are a man he said, “he will know as soon as he sees you; and he will know whether you are good or bad, if he is by experience skillful to distinguish the good and the bad; but if he is without experience, he will never know, if I write to him ten thousand times.” For it is just the same as if a drachma asked to be recommended to a person to be tested. If he is skillful in testing silver, he will know what you are, for you will recommend yourself. We ought then in life also to have some skill as in the case of silver coin that a man may be ............