The Encheiridion, or Manual (45-47)

Does a man bathe quickly (early)? do not say that he bathes badly, but that he bathes quickly. Does a man drink much wine? do not say that he does this badly, but say that he drinks much. For before you shall have determined the opinion,[*] how do you know whether he is acting wrong? Thus it will not happen to you to comprehend some appearances which are capable of being comprehended, but to assent to others.

On no occasion call yourself a philosopher, and do not speak much among the uninstructed about theorems (philosophical rules, precepts): but do that which follows from them. For example at a banquet do not say how a man ought to eat, but eat as you ought to eat. For remember that in this way Socrates[*] also altogether avoided ostentation: persons used to come to him and ask to be recommended by him to philosophers, and he used to take them to philosophers: so easily did he submit to being overlooked. Accordingly if any conversation should arise among uninstructed persons about any theorem, generally be silent; for there is great danger that you will immediately vomit up what you have not digested. And when a man shall say to you, that you know nothing, and you are not vexed, then be sure that you have begun the work (of philosophy). For even sheep do not vomit up

When at a small cost you are supplied with every thing for the body, do not be proud of this; nor, if you drink water, say on every occasion, I drink water. But consider first how much more frugal the poor are than we, and how much more enduring of labour. And if you ever wish to exercise yourself in labour and endurance, do it for yourself, and not for others: do not embrace statues.[*] But if you are ever very thirsty, take a draught of cold water, and spit it out, and tell no man.