Plato Epinomis 976

And that which they call medicine is likewise, of course, an assistance in almost every case towards things of which animal nature is deprived by seasons of untimely cold and heat and all such visitations. But none of these is of high repute for the truest wisdom: for they are borne along by opinion, as inaccurate matter of conjecture. We may, I suppose, speak of pilots and sailors alike as giving assistance: yet you shall not report, to appease us, a single wise man from amongst them all; for a man cannot know 976b the wrath or amity of the wind, a desirable thing for all piloting. Nor again all those who say they can give assistance in law suits by their powers of speech, men who by memory and exercise of opinion pay attention to human character, but are far astray from the truth of what is really just.
  There still remains, as a claimant to the name of wisdom, a certain strange power, which most people would call a natural gift rather than wisdom, appearing when one perceives someone learning this or that lesson with ease, or remembering a great many things 976c securely; or when one recalls what is suitable to each person, what should properly be done, and does it quickly. Some people will describe all this as nature, others as wisdom, and others as a natural readiness of mind: but no sensible person will ever call a man really wise for any of these gifts.
  But surely there must be found some science, the possession of which will cause the wisdom of him who is really wise and not wise merely in men’s opinion. Well, let us see: for in this laborious discussion we are trying our hardest to find some other science, 976d apart from those we have mentioned, which can really and reasonably be termed wisdom; such an acquirement as will not make one a mean and witless drudge, but will enable one to be a wise and good citizen, at once a just ruler and subject of his city, and decorous. ¹ So let us examine this one first, and see what single science it is of those that we now have which, by removing itself or being absent from human nature, must render mankind the most thoughtless and senseless of creatures. 976e Well, there is no great difficulty in making that out. For if there is one more than another, so to speak, which will do this, it is the science which gave number to the whole race of mortals; and I believe God rather than some chance gave it to us, and so preserves us.