THE VARIOUS BRANCHES OF PHILOSOPHY CROWNED BY DIALECTICS.
6. Dialectics, therefore, is only one part of philosophy, but the most important. Indeed, philosophy has other branches. First, it studies nature (in physics), therein employing dialectics, as the other arts employ arithmetic, though philosophy owes far more to dialectics. Then philosophy treats of morals, and here again it is dialectics that ascertains the principles; ethics limits itself to building good habits thereon, and to propose the exercises that shall produce those good habits. The (Aristotelian) rational virtues also owe to dialectics the principles which seem to be their characteristics; for they chiefly deal with material things (because they moderate the passions). The other virtues[351] also imply the application of reason to the passions and actions which are characteristic of each of them. However, prudence applies reason to them in a superior manner. Prudence deals rather with the universal, considering whether the virtues concatenate, and whether an action should be done now, or be deferred, or be superseded by another[352] (as thought Aristotle). Now it is dialectics, or its resultant science of wisdom which, under a general and immaterial form, furnishes prudence with all the principles it needs.