Book 6

Section 8

Prudence is indeed the same quality of mind as Political Science, though their essence is different.

Of Prudence as regards the state, one kind, as supreme and directive, is called Legislative Science ; the other, as dealing with particular occurrences, has the name, Political Science, that really belongs to both kinds. The latter is concerned with action and deliberation (for a parliamentary enactment is a thing to be done, being the last step in a deliberative process), and this is why it is only those persons who deal with particular facts who are spoken of as taking part in politics, because it is only they who perform actions, like the workmen in an industry.

Prudence also is commonly understood to mean especially that kind of wisdom which is concerned with oneself, the individual; and this is given the name, Prudence, which really belongs to all the kinds, while the others are distinguished as Domestic Economy, Legislature, and Political Science, the latter being subdivided into Deliberative Science and Judicial Science.

Now knowledge of one’s own interest will certainly be one kind of Prudence; though it is very different from the other kinds, and people think that the man who knows and minds his own business is prudent, and that politicians are busybodies: thus Euripides writes—

Would that be prudent? when I might have lived A quiet life, a cipher in the crowd, Sharing the common fortune. . . Restless, aspiring, busy men of action. . .
For people seek their own good, and suppose that it is right to do so. Hence this belief has caused the word prudent to mean those who are wise in their own interest. Yet probably as a matter of fact a man cannot pursue his own welfare without Domestic Economy and even Politics. Moreover, even the proper conduct of one’s own affairs is a difficult problem, and requires consideration.

A further proof of what has been said is, that although the young may be experts in geometry and mathematics and similar branches of knowledge, we do not consider that a young man can have Prudence. The reason is that Prudence includes a knowledge of particular facts, and this is derived from experience, which a young man does not a possess;

for experience is the fruit of years. (One might indeed further enquire why it is that, though a boy may be a mathematician, he cannot be a metaphysician or a natural philosopher. Perhaps the answer is that Mathematics deals with abstractions, whereas the first principles of Metaphysics and Natural Philosophy are derived from experience: the young can only repeat them without conviction of their truth, whereas the formal concepts of Mathematics are easily understood.)

Again, in deliberation there is a double possibility of error: you may go wrong either in your general principle or in your particular fact: for instance, either in asserting that all heavy water is unwholesome, or that the particular water in question is heavy.

And it is clear that Prudence is not the same as Scientific Knowledge: for as has been said, it apprehends ultimate particular things, since the thing to be done is an ultimate particular thing.

Prudence then stands opposite to Intelligence; for Intelligence apprehends definitions, which cannot be proved by reasoning, while Prudence deals with the ultimate particular thing, which cannot be apprehended by Scientific Knowledge, but only by perception: not the perception of the special senses, but the sort of intuition whereby we perceive that the ultimate figure in mathematics is a triangle ; for there, too, there will be a stop. But the term perception applies in a fuller sense to mathematical intuition than to Prudence; the practical intuition of the latter belongs to a different species.