12.: Of the uses of wisdom and prudence. How prudence is related to cleverness. - Aristotle, The Nicomachean Ethics 
The Nichomachean Ethics of Aristotle, trans. F.H. Peters, M.A. 5th edition (London: Kegan Paul, Trench, Truebner & Co., 1893).
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- Preface to the Fifth Edition.
- Book I.: The End.
- 1.: In All He Does Man Seeks Same Good As End Or Means.
- 2.: The End Is the Good; Our Subject Is This and Its Science Politics.
- 3.: Exactness Not Permitted By Subject Nor to Be Expected By Student, Who Needs Experience and Training.
- 4.: Men Agree That the Good Is Happiness, But Differ As to What This Is.
- 5.: The Good Cannot Be Pleasure, Nor Honour, Nor Virtue.
- 6.: Various Arguments to Show Against the Platonists That There Cannot Be One Universal Good.
- 7.: The Good Is the Final End, and Happiness Is This.
- 8.: This View Harmonizes Various Current Views.
- 9.: It Happiness Acquired, Or the Gift of Gods Or of Chance?
- 10.: Can No Man Be Called Happy During Life?
- 11.: Cannot the Fortunes of Survivors Affect the Dead?
- 12.: Happiness As Absolute End Is Above Praise.
- 13.: Division of the Faculties and Resulting Division of the Virtues.
- Book II.: Moral Virtue.
- 1.: Moral Virtue Is Acquired By the Repetition of the Corresponding Acts.
- 2.: These Acts Must Be Such As Reason Prescribes; They Can’t Be Defined Exactly, But Must Be Neither Too Much Nor Too Little.
- 3.: Virtue Is In Various Ways Concerned With Pleasure and Pain.
- 4.: The Conditions of Virtuous Action As Distinct From Artistic Production.
- 5.: Virtue Not an Emotion, Nor a Faculty, But a Trained Faculty Or Habit.
- 6.: Viz., the Habit of Choosing the Mean.
- 7.: This Must Be Applied to the Several Virtues.
- 8.: The Two Vicious Extremes Are Opposed to One Another and to the Intermediate Virtue.
- 9.: The Mean Hard to Hit, and Is a Matter of Perception, Not of Reasoning.
- Book III.
- Chapters 1–5.: the Will.
- 1.: An Act Is Involuntary When Done (a) Under Compulsion, Or (b) Through Ignorance: (a) Means Not Originated By Doer, (b) Means Through Ignorance of the Circumstances: Voluntary Then Means Originated With Knowledge of Circumstances.
- 2.: Purpose, a Mode of Will, Means Choice After Deliberation.
- 3.: We Deliberate On What We Can Do—not On Ends, But Means.
- 4.: We Wish For
- 5.: Virtue and Vice Are Alike Voluntary, Our Acts Are Our Own; For We Are Punished For Them; If This Be Our Character, We Have Made It By Repeated Acts; Even Bodily Vices Are Blamable When Thus Formed. We Cannot Plead That Our Notion of Good Depends On Ou
- Chapters 6—12: the Several Moral Virtues and Vices.
- 6.: Of Courage and the Opposite Vices.
- 7. Of Courage (continued)
- 8. Of Courage Improperly So Called.
- 9.: How Courage Involves Both Pain and Pleasure.
- 10.: Of Temperance.
- 11. Of Temperance (continued)
- 12.: How Profligacy Is More Voluntary Than Cowardice.
- Book IV.: The Several Moral Virtues and Vices— Continued.
- 1.: Of Liberality.
- 2.: Of Magnificence.
- 3.: Of High-mindedness
- 4.: Of a Similar Virtue In Smaller Matters.
- 5.: Of Gentleness.
- 6.: Of Agreeableness.
- 7.: Of Truthfulness.
- 8.: Of Wittiness.
- 9.: Of the Feeling of Shame
- Book V.: The Several Moral Virtues and Vices— Concluded. Justice.
- 1.: Preliminary Two Senses of Justice Distinguished Justice (l) = Obedience to Law = Complete Virtue.
- 2.: Of Justice (2) = Fairness, How Related to Justice (1). What Is Just In Distribution Distinguished From What Is Just In Correction.
- 3.: Of What Is Just In Ditribution and Its Rule of Geometrical Proportion.
- 4.: Of That Which Is Just In Correction, and Its Rule of Arithmetical Proportion.
- 5.: Simple Requital Is Not Identical With What Is Just, But Proportionate Requital Is What Is Just In Exchange; and This Is Effected By Means of Money. We Can Now Give a General Definition of Justice (2).
- 6.: ( One Can Act Unjustly Without Being Unjust. ) That Which Is Just In the Strict Sense Is Between Citizens Only, For It Implies Law.
- 7.: It Is In Part Natural, In Part Conventional.
- 8.: The Internal Conditions of a Just Or Unjust Action, and of a Just Or Unjust Agent.
- 9.: Sundry Questions About Doing and Suffering Injustice
- 10.: Of Equity
- 11.: Can a Man Wrong Himself?
- Book VI.: The Intellectual Virtues.
- 1.: Must Be Studied Because (a) Reason Prescribes the Mean, (b) They Are a Part of Human Excellence. the Intellect Is (1) Scientific, (2) Calculative: We Want the Virtue of Each.
- 2.: The Function of the Intellect, Both In Practice and Speculation, Is to Attain Truth.
- 3.: Of the Five Modes of Attaining Truth: (1) of Demonstrative Science of Things Invariable.
- 4.: Of Knowledge of Things Variable, Viz. (2) of Art In What We Make;
- 5.: And (3) of Prudence In What We Do, the Virtue of the Calculative Intellect.
- 6.: (4) of Intuitive Reason As the Basis of Demonstrative Science.
- 7.: (5) of Wisdom As the Union of Science and Intuitive Reason. Comparison of the Two Intellectual Virtues, Wisdom and Prudence.
- 8.: Prudence Compared With Statesmanship and Other Forms of Knowledge.
- 9.: Of Deliberation.
- 10.: Of Intelligence
- 11.: Of Judgment of Reason Or Intuitive Perception As the Basis of the Practical Intellect.
- 12.: Of the Uses of Wisdom and Prudence. How Prudence Is Related to Cleverness.
- 13.: How Prudence Is Related to Moral Virtue
- Book VII.
- Chapters 1–10.: Characters Other Than Virtue and Vice.
- 1.: Of Continence and Incontinence, Heroic Virtue and Brutality. of Method. Statement of Opinions About Continence.
- 2.: Statement of Difficulties As to How One Can Know Right and Do Wrong.
- 3.: Solution: to Know Has Many Senses; In What Sense Such a Man Knows.
- 4.: Of Incontinence In the Strict and In the Metaphorical Sense.
- 5.: Of Incontinence In Respect of Brutal Or Morbid Appetites.
- 6.: Incontinence In Anger Less Blamed Than In Appetite.
- 7.: Incontinence Yields to Pleasure, Softness to Pain. Two Kinds of Incontinence, the Hasty and the Weak.
- 8.: Incontinence Compared With Vice and Virtue.
- 9.: Continence and Incontinence Not Identical With Keeping and Breaking a Resolution.
- 10.: Prudence Is Not, But Cleverness Is, Compatible With Incontinence.
- Chapters 11—14.: of Pleasure.
- 11.: We Must Now Discuss Pleasure. Opinions About It.
- 12.: Answers to Arguments Against Goodness of Pleasure. Ambiguity of Good and Pleasant. Pleasure Not a Transition, But Unimpeded Activity.
- 13.: Pleasure Is Good, and the Pleasure That Consists In the Highest Activity Is the Good. All Admit That Happiness Is Pleasant. Bodily Pleasures Not the Only Pleasures.
- 14.: Of the Bodily Pleasures, and the Distinction Between Naturally and Accidentally Pleasant.
- Book VIII.: Friendship Or Love.
- 1.: Uses of Friendship. Differences of Opinion About It.
- 2.: Three Motives of Friendship. Friendship Defined.
- 3.: Three Kinds of Friendship, Corresponding to the Three Motives Perfect Friendship Is That Whose Motive Is the Good.
- 4.: The Others Are Imperfect Copies of This.
- 5.: Intercourse Necessary to the Maintenance of Friendship.
- 6.: Impossible to Have Many True Friends.
- 7.: Of Friendship Between Unequal Persons and Its Rule of Proportion. Limits Within Which This Is Possible.
- 8.: Of Loving and Being Loved.
- 9.: Every Society Has Its Own Form of Friendship As of Justice. All Societies Are Summed Up In Civil Society.
- 10.: Of the Three Forms of Constitution.
- 11.: Of the Corresponding Forms of Friendship.
- 12.: Of the Friendship of Kinsmen and Comrades.
- 13.: Of the Terms of Interchange and Quarrels Hence Arising In Equal Friendships.
- 14.: Of the Same In Unequal Friendships.
- Book IX.: Friendship Or Love— Continued.
- 1.: Of the Rule of Proportion In Dissimilar Friendships.
- 2.: Of the Conflict of Duties.
- 3.: Of the Dissolution of Friendships.
- 4.: A Man’s Relation to His Friend Like His Relation to Himself.
- 5.: Friendship and Goodwill.
- 6.: Friendship and Unanimity
- 7.: Why Benefactors Love More Than They Are Loved.
- 8.: In What Sense It Is Right to Love One’s Self.
- 9.: Why a Happy Man Needs Friends.
- 10.: Of the Proper Number of Friends.
- 11.: Friends Needed Both In Prosperity and Adversity.
- 12.: Friendship Is Realized In Living Together.
- Book X.
- Chapters 1–5.: Pleasure.
- 1.: Reasons For Discussing Pleasure.
- 2.: Arguments of Eudoxus That Pleasure Is the Good.
- 3.: Argument That It Is Not a Quality; That It Is Not Determined; That It Is a Motion Or Coming Into Being. Pleasures Differ In Kind.
- 4.: Pleasure Defined: Its Relation to Activity.
- 5.: Pleasures Differ According to the Activities the Standard Is the Good Man.
- Chapters 6–9.: Conclusion.
- 6.: Happiness Not Amusement, But Life.
- 7.: Of the Speculative Life As Happiness In the Highest Sense.
- 8.: Of the Practical Life As Happiness In a Lower Sense, and of the Relation Between the Two. Prosperity, How Far Needed.
- 9.: How Is the End to Be Realized?
Of the uses of wisdom and prudence. How prudence is related to cleverness.
But here an objection may be raised. “What is the use of them?” it may be asked. “Wisdom does not consider what tends to make man happy (for it does not ask how anything is brought about). Prudence indeed does this, but why do we need it? Prudence is the faculty which deals with what is just and noble and good for man, i.e. with those things which it is the part of the good man to do; but the knowledge of them no more makes us apter to do them, if (as has been said) the [moral] virtues are habits, than it does in the case of what is healthy and wholesome—healthy and wholesome, that is, not in the sense of conducing to, but in the sense of issuing from, a healthy habit; for a knowledge of medicine and gymnastics does not make us more able to do these things.
“But if it be meant that a man should be prudent, not in order that he may do these acts, but in order that he may become able to do them, then prudence will be no use to those who are good, nor even to those who are not. For it will not matter whether they have prudence themselves, or take the advice of others who have it. It will be enough to do in these matters as we do in regard to health; for if we wish to be in health, we do not go and learn medicine.
“Again, it seems to be a strange thing that prudence, though inferior to wisdom, must yet govern it, since in every field the practical faculty bears sway and issues orders.”
We must now discuss these points; for hitherto we have been only stating objections.
First, then, we may say that both prudence and wisdom must be desirable in themselves, since each is the virtue of one of the parts of the soul, even if neither of them produces anything.
Next, they do produce something.
On the one hand, wisdom produces happiness, not in the sense in which medicine produces health, but in the sense in which health produces health; that is to say, wisdom being a part of complete virtue, its possession and exercise make a man happy.
On the other hand [in the sphere of action], man performs his function perfectly when he acts in accordance with both prudence and moral virtue; for while the latter ensures the rightness of the end aimed at, the former ensures the rightness of the means thereto.
The fourth part of the soul, the vegetative part, or the faculty of nutrition, has no analogous excellence; for it has no power to act or not to act.
But as to the objection that prudence makes us no more apt to do what is noble and just, let us take the matter a little deeper, beginning thus:—
We allow, on the one hand, that some who do just acts are not yet just; e.g. those who do what the laws enjoin either unwillingly or unwittingly, or for some external motive and not for the sake of the acts themselves (though they do that which they ought and all that a good man should do). And, on the other hand, it seems that when a man does the several acts with a certain disposition he is good; i.e. when he does them of deliberate purpose, and for the sake of the acts themselves.
Now, the rightness of the purpose is secured by [moral] virtue, but to decide what is proper to be done in order to carry out the purpose belongs not to [moral] virtue, but to another faculty. But we must dwell a little on this point and try to make it quite clear.
There is a faculty which we call cleverness (δεινότης)—the power of carrying out the means to any proposed end, and so achieving it. If then the end be noble, the power merits praise; but if the end be base, the power is the power of the villain. So we apply the term clever both to the prudent man and the villain.
Now, this power is not identical with prudence, but is its necessary condition. But this power, the “eye of the soul” as we may call it, does not attain its perfect development without moral virtue, as we said before, and as may be shown thus:—
All syllogisms or deductive reasonings about what is to be done have for their starting point [principle or major premise] “the end or the supreme good is so and so” (whatever it be; any definition of the good will do for the argument). But it is only to the good man that this presents itself as the good; for vice perverts us and causes us to err about the principles of action. So it is plain, as we said, that it is impossible to be prudent without being morally good.