Against those who hastily rush into the use of the philosophic dress Never praise nor blame a man because of the things which are common, and do not ascribe to him any skill or want of skill; and thus you will be free from rashness and from malevolence. "This man bathes very quickly." Does he then do wrong? Certainly not. But what does he do? He bathes very quickly.
Are all things then done well? By no means: but the acts which proceed from right opinions are done well; and those which proceed from bad opinions are done ill. But do you, until you know the opinion from which a man does each thing, neither praise nor blame the act. But the opinion is not easily discovered from the external things. "This man is a carpenter." Why? "Because he uses an ax." What, then, is this to the matter?
"This man is a musician because he sings." And what does that signify? "This man is a philosopher. Because he wears a cloak and long hair." And what does a juggler wear? For this reason if a man sees any philosopher acting indecently, immediately he says, "See what the philosopher is doing"; but he ought because of the man's indecent behavior rather to say that he is not a philosopher. For if this is the preconceived notion of a philosopher and what he professes, to wear a cloak and long hair, men would say well; but if what he professes is this rather, to keep himself free from faults, why do we not rather, because he does not make good his professions, take from him the name of philosopher? For so we do in the case of all other arts.
When a man sees another handling an ax badly, he does not say, "What is the use of the carpenter's art? See how badly carpenters do their work"; but he says just the contrary, "This man is not a carpenter, for he uses an ax badly." In the same way if a man hears another singing badly, he does not say, "See how musicians sing"; but rather, "This man is not a musician."
But it is in the matter of philosophy only that people do this. When they see a man acting contrary to the profession of a philosopher, they do not take away his title, but they assume him to be a philosopher, and from his acts deriving the fact that he is behaving indecently they conclude that there is no use in philosophy.
What, then, is the reason of this? Because we attach value to the notion of a carpenter, and to that of a musician, and to the notion of other artisans in like manner, but not to that of a philosopher, and we judge from externals only that it is a thing confused and ill defined. And what other kind of art has a name from the dress and the hair; and has not theorems and a material and an end? What, then, is the material of the philosopher? Is it a cloak? No, but reason. What is his end? is it to wear a cloak? No, but to possess the reason in a right state. Of what kind are his theorems? Are they those about the way in which the beard becomes great or the hair long? No, but rather what Zeno says, to know the elements of reason, what kind of a thing each of them is, and how they are fitted to one another, and what things are consequent upon them. Will you not, then, see first if he does what he professes when he acts in an unbecoming manner, and then blame his study? But now when you yourself are acting in a sober way, you say in consequence of what he seems to you to be doing wrong, "Look at the philosopher," as if it were proper to call by the name of philosopher one who does these things; and further, "This is the conduct of a philosopher." But you do not say, "Look at the carpenter," when you know that a carpenter is an adulterer or you see him to be a glutton; nor do you say, "See the musician." Thus to a certain degree even you perceive the profession of a philosopher, but you fall away from the notion, and you are confused through want of care.
