4503. In visiting the sick, do not presently play the physician, if you be not knowing therein.
4504. In writing, or speaking, give to every person his due title, according to his degree and the custom of the place.
4505. Strive not with your superiors in argument, but always submit your judgment to others with modesty.
4506. Undertake not to teach your equal in the art he himself professes; it savors of arrogance.
4507. When a man does all he can, though it succeeds not well, blame not him that did it.