The Limits of Teaching

Can the Highest Forms of Human Excellence Be Taught?

If the greatest Athenians could not teach virtue to their own sons, can virtue be taught?

Can courage be taught? Can wisdom? Can goodness?

We take it for granted that mathematics can be taught, languages can be taught, and medicine can be taught. But what of the qualities that matter most? Can they, too, be passed from teacher to pupil, or picked up from a textbook?

More than two thousand years ago, Plato wrestled with exactly this question.

The First Puzzle

In one of Plato’s early dialogues, the Laches, Socrates asks two generals, Laches and Nicias, to define courage. Laches thinks the question an easy one, and asserts that courage is when a soldier is willing to remain at his post and fight against the enemy.

Socrates objects that a soldier who flees from his post can also sometimes be called courageous. He cites the example of the Scythian cavalry who combat both in pursuit and in retreat, and of the mythical hero Aeneas who, Homer says, was always fleeing on horses. Homer praised Aeneas for his knowledge of fear, and called him the ‘counsellor of fear’. When Laches protests that Socrates is speaking of horsemen and charioteers rather than hoplites (foot soldiers), Socrates layers on the example of the Spartan hoplites at the Battle of Plataea, who fled the enemy but then turned back to fight once the enemy lines had broken.

What Socrates really wants to know is what courage is in all of its instances—not only for the hoplite, but also for the horseman, the charioteer, and every other class of warrior, as well as for those who ‘show courage in illness and poverty’, ‘are brave in the face of pain and fear’, and so on. What is it that all these instances of courage have in common? For example, quickness can be found in running, in speaking, and in playing the lyre, and in each instance, ‘quickness’ can be defined as ‘the quality that accomplishes much in a little time’. Is there a similar, single, unifying definition of ‘courage’ that can apply to all of its instances? Before reading on, think upon it for yourself… How would you define courage?

This time, Laches defines courage as ‘a sort of endurance of the soul’. But Socrates points out that endurance can be foolish as well as wise, and foolish endurance is likely to be harmful. After several more attempts, Nicias suggests that courage is some sort of knowledge or wisdom. Socrates says that, if Nicias means that courage is knowledge of the true grounds of fear and hope, then courage must be very rare among men; while animals, which want for such knowledge, could never be called ‘courageous’ but at most ‘fearless’—which, indeed, ordinary language use seems to confirm. Nicias concurs, and surmises that the same is also true of children: ‘Or do you really suppose I call all children courageous, who fear nothing because they have no sense?’

Socrates presses the argument further until he reaches a remarkable conclusion: if courage, and virtue in general, is knowledge, it cannot be separated from the rest of knowledge and wisdom. In seeking to define courage, the three of them have succeeded in defining virtue herself. Virtue is knowledge, which is why people with some measure of one virtue usually have a similar measure of the other virtues and of virtue in general—a thesis known as the Unity of the Virtues.

The First Solution

Courage, says Socrates, is knowledge or wisdom. Suppose I am walking along a beach and see someone drowning. I know that I can’t swim and that the currents are strong, but jump in anyway because a human life is at stake. Moments later, I too need rescuing. Having misjudged the situation, I have only made it worse, and acted not courageously but recklessly.

The lifeguard, in contrast, is a strong swimmer and equipped with a floater. From her years of experience and familiarity with the beach, she knows that if she dives in she stands an excellent chance of making a rescue. Of course, there is some risk involved, but the potential benefit is so large and so likely that it far outweighs the risk. If the lifeguard truly understands all this, she will ‘courageously’ dive in. If she does not dive in, she has not fully grasped the situation.

One of Socrates’ most famous arguments is that no one ever knowingly does evil. People do wrong not because their ethics are overwhelmed by a desire for pleasure, as is often believed, but because they are unable to weigh up pleasures and pains. They act with recklessness or cowardice or foolishness or vice (which are all really one and the same thing) because, from their limited perspective, it seems like the right or best thing to do. But if they knew better, they would behave differently. Virtue, then, is a form of knowledge.

The Fatal Objection

If Socrates is right in holding that courage and all of virtue is knowledge, then surely courage and the other virtues can be taught by the same methods as geometry or medicine or any other field of human knowledge. So who is wrong, Socrates in holding that courage is knowledge, or us in our common intuition that courage cannot simply be taught?

Plato returned to the problem in a later dialogue. In the Meno, Socrates observes that people with wisdom and virtue are very poor at imparting those qualities. Themistocles, the great Athenian statesman and general, was able to teach his son Cleophantus skills such as standing upright on horseback and shooting javelins, but no one ever credited the poor wretch with anything like his father’s wisdom—and the same could also be said of Lysimachus and his son Aristides, and Thucydides and his sons Melesias and Stephanus.

Perhaps it was too early in 402, the dramatic date of the Meno, for Socrates to have added his own three sons to the roll of dolts and dunderheads, but Aristotle, who had the benefit of hindsight, tells us that they too grew up to be ‘fools and dullards’.

In another dialogue, the Protagoras, Socrates says that Pericles, who led Athens at the peak of its golden age, gave his sons Paralus and Xanthippus the most excellent instruction in everything that could be learnt from teachers. But when it came to wisdom, this paragon of wisdom simply left them to ‘wander at their own free will in a sort of hope that they would light upon virtue of their own accord’.

A New Answer

If virtue cannot be taught, not even by the most eminent and distinguished of Athenians, then it is not, after all, a type of knowledge.

But then how, asks Meno, did good people come into being?

Socrates replies that he and Meno have overlooked that right action is possible under guidance other than that of knowledge. A man who has knowledge of the road to Larissa (a city in Thessaly) may make a good guide, but a man who has only correct opinion of the road, but has never been and does not know, may in some cases make just as good a guide. If he who thinks the truth can be just as good a guide to Larissa as he who knows the truth, then correct opinion can be just as good a guide to right action as knowledge.

If this be true, how is knowledge, which is the more highly prized, any different from correct opinion? Socrates compares correct opinions to the statues of Daedalus (a mythical architect and craftsman of unsurpassed skill), which had to be tied down to prevent them from running away. Correct opinions can be tied down with ‘an account of the reason why’, whereupon they cease to be correct opinions and petrify into knowledge.

Since courage and the other parts of virtue are not knowledge, all that remains is for them to be correct opinion. This much explains why the likes of Themistocles and Lysimachus and even the great Pericles were unable to make anything much out of their sons—and why, then as today, having children is to dice with the devil. Good people are no different from soothsayers, prophets, and poets, who say many true things when they are inspired but have no real knowledge of what they are saying.

The Teachers We Remember

Courage, like all the virtues, consists not in knowledge but in correct opinion. The virtues relate to human behaviour, and in particular to good or moral behaviour—that is, to ethics. In ethics, the choice of one action over another, or others, involves a complex and indeterminate calculus that cannot be condensed into, and hence expressed as, knowledge. Whereas knowledge is concrete and exact, correct opinion is subtle and ineffable, and more the province of intuition than of reason, of art than of science. For this reason, correct opinion cannot be taught but only ever invited or inspired.

The best education consists not in being taught but in being inspired.

The teachers who we hold in our hearts, those we never forget, are not those who assiduously taught us the most facts, or fastidiously covered every bulleted point on the syllabus, but those who inspired us and opened us up to ourselves and to the world.

Unfortunately, many people are not amenable to being inspired, not even by the most charismatic teachers or greatest works of art—which is why, in the final reckoning, Socrates and Plato held virtue to be a gift of the gods.

…if we were right in the way we spoke … virtue would be neither an inborn quality nor taught, but comes to those who possess it as a gift of the gods which is not accompanied by understanding, unless there is someone among our statesmen who can make another into a statesman. If there were one, he would be said to be among the living as Homer said Tiresias was among the dead, namely, that ‘he alone retained his wits while the others flitted about like shadows’. —Plato, Meno