(Now truth is one and philosophy is one, and they whom I just now spoke of are its lovers one and all; and also they whom I ought in fairness to mention now by name, I mean the disciples of the man of Citium.(28) For when they saw that the cities of Greece were averse to the excessive plainness and simplicity of the Cynic’s freedom of manners, they hedged him about with screens as it were, I mean with maxims on the management of the household and business and intercourse with one’s wife and the rearing of children, to the end, I believe, that they might make him the intimate guardian of the public welfare.(29) And that they too held the maxim “Know Thyself” to be the first principle of their philosophy you may believe, if you will, not only from the works that they composed on this very subject, but even more from what they made the end and aim of their philosophic teaching. For this end of theirs was life in harmony with nature, and this it is impossible for any man to attain who does not know who and of what nature he is. For a man who does not know himself will certainly not know what it is becoming for him to do; just as he who does not know the nature of iron will not know whether it is suitable to cut with or not, and how iron must be treated so that it may be put to its proper use. For the moment however I have said enough to show that philosophy is one, and that, to speak generally, all philosophers have a single aim though they arrive at that aim by different roads. And now let us consider the Cynic philosophy.)