Xenophon: Hiero or Tyrannicus by Leo Strauss

"I will tell you of another harsh affliction, Simonides, which the tyrants have. For although they are acquainted with the decent, the wise, and the just, no less than private men [the tyrants] fear rather than admire them. They fear the brave because they might dare something for the sake of freedom; the wise, because they might contrive something; and the just, because the multitude might desire to be ruled by them.

When, because of their fear, they do away secretly with such men, who is left for them to use save the unjust, the incontinent, and the slavish? The unjust are trusted because they are afraid, just as the tyrants are, that some day the cities, becoming free, will become their masters. The incontinent are trusted because they are at liberty for the present, and the slavish because not even they deem themselves worthy to be free. This affliction, then, seems harsh to me: to think some are good men, and yet to be compelled to make use of the others.