Plutarch Quomodo adulator ab amico internoscatur 37

[37] Since, then, as has been said, frankness, from its very nature, is oftentimes painful to the person to whom it is applied, there is need to follow the example of the physicians; for they, in a surgical operation, do not leave the part that has been operated upon in its suffering and pain, but treat it with soothing lotions and fomentations; nor do persons that use admonition with skill simply apply its bitterness and sting, and then run away; but by further converse and gentle words they mollify and assuage, even as stone-cutters smooth and polish the portions of statues that have been previously hammered and chiselled. But the man who has been hard hit and scored by frankness, if he be left rough and tumid and uneven, will, owing to the effect of anger, not readily respond to an appeal the next time, or put up with attempts to soothe him. Therefore those who employ admonition should be particularly on their guard in this respect, and not take their leave too soon, nor allow anything painful and irritating to their acquaintances to form the final topic of conversation at an interview.

[37] But because, as it has been before observed, reproofs usually carry something of trouble and vexation along with them, we must imitate skilful physicians, who, when they have made an incision in the flesh, leave it not open to the smart and torment that attends it, but chafe and foment it to assuage the pain. So he who would admonish dexterously must not immediately give a man over to the sting and anguish of his reprehensions, but endeavor to skin over the sore with a more mild and diverting converse; like stone-cutters, who, when they have made a fracture in their statues, polish and brighten them afterwards. But if we leave them in pain with their wounds and resentments, and (as it were) with the scars of our reproofs yet green upon them, they will hardly be brought to admit of any lenitive we shall offer for the future. And therefore they who will take upon them to admonish their friends ought especially to observe this main point, not to leave them immediately upon it, nor abruptly break off the conference with disobliging and bitter expressions.