Plutarch, De curiositate
Goodwin, Ed.

Now since it is from the use and custom of intermeddling in the affairs of other men that this perverse practice grows up into such a vicious habit, therefore the best remedy thereof is, that beginning (as it were) at a distance, and with such things as do less excite the itch of our curiosity, we gradually bring ourselves to an utter desuetude of enquiring into or being concerned at any of those things that do not pertain unto us. Therefore let men first make trial of themselves in smaller and less considerable matters. As for the purpose, why should it be thought such a severe piece of self-denial for any man, as he passes by, to forbear reading the inscriptions that are upon a monument or gravestone, or the letters that are drawn on walls and sign-posts, if it were but considered that there is nothing more, either for delight or benefit, to be learned thereby, but that certain people had a desire to preserve the memory of their friends and relations by engraving their names on brass or marble, or that some impudent quack or rooking tradesman wants money, and knows no other way to draw men to their shop or lodgings, but by decoying billets and the invitation of a show-board? The taking notice of which and such like things may seem for the present harmless; yet there is really a secret mischief wrought by it, while men, suffering their minds to rove so inconsiderately at every thing they see, are inured to a foolish curiosity in busying themselves about things impertinent. For as skilful huntsmen do not permit their beagles to fling or change, but lead them forth [p. 439] in couples, that their noses may be kept sharp for their proper game,

With scent most quick of nostrils after kind,
The tracks of beast so wild in chase to find;

so ought persons of an inquisitive temper to restrain the wanton excursions of their curiosity, and confine it to observations of prudence and sobriety. Thus the lion and eagle, which walk with their claws sheathed to keep them always pointed for their prey, are an example of that discretion which curious persons should imitate, by carefully preserving those noble faculties of wit and understanding, which were made for useful and excellent enquiries, from being dulled and debauched with low and sottish speculations.