First Cleanthes. If all the virtues are one in the way he means, what is, for example, courage? Courage would be in part a kind of knowledge about what is and is not to be feared and how we should behave in the face of that which threatens us. The other half of courage would be knowledge about the exercise of this first knowledge; a kind of second-order knowledge. But what can we say about the difference between this knowledge and, say, prudence or practical wisdom? They would both be a kind of knowledge, and the object of both kinds, in the second-order version, is a correct exercise of that
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