Epops: You're mistaken: men of sense often learn from their enemies. Prudence is the best safeguard. This principle cannot be learned from a friend, but an enemy extorts it immediately. It is from their foes, not their friends, that cities learn the lesson of building high walls and ships of war. And this lesson saves their children, their homes, and their properties. Chorus [leader]: It appears then that it will be better for us to hear what they have to say first; for one may learn something at times even from one's enemies. (tr. Anon. 1812 rev. in Ramage 1864, p. 45)

It occurred to me that if my friends were loathsome, perhaps I needed to learn from my enemies.

A little Learning is a dangerous Thing.

"When a man starts to learn, he is never clear about his objectives. His purpose is faulty. His intent is vague. He hopes for rewards that will never materialize, for he knows nothing of the hardships of learning.
"He slowly begins to learn- bit by bit at first, then in big chunks. And his thoughts soon clash. What he learns is never what he pictured, or imagined, and so he begins to be afraid. Learning is never what one expects. Every step of learning is a new task, and the fear the man is experiencing begins to mount mercilessly, unyieldingly. His purpose becomes a battlefield.
"And thus he has tumbled upon the first of his natural enemies: Fear! A terrible enemy- treacherous, and difficult to overcome. It remains concealed at every turn of the way, prowling, waiting. And if the man, terrified in its presence, runs away, his enemy will have put an end to his quest."

Fas est ab hoste doceri.
One should learn even from one's enemies.

Men of sense often learn from their enemies. It is from their foes, not their friends, that cities learn the lesson of building high walls and ships of war; and this lesson saves their children, their homes, and their properties.

... men of sense often learn from their enemies. Prudence is the best safeguard. This principle cannot be learned from a friend, but an enemy extorts it immediately. It is from their foes, not their friends, that cities learn the lesson of building high walls and ships of war. And this lesson saves their children, their homes, and their properties.

The wise learn many things from their enemies.

Success is the enemy of learning. It can deprive you of the time and the incentive to start over. Beginner’s mind also needs beginner’s time.

Epops: Yet, certainly, the wise learn many things from their enemies; for caution preserves all things. From a friend you could not learn this, but your foe immediately obliges you to learn it. For example, the states have learned from enemies, and not from friends, to build lofty walls, and to possess ships of war. And this lesson preserves children, house, and possessions. Chorus [leader]: It is useful, as it appears to me, to hear their arguments first; for one might learn some wisdom even from one's foes. (tr. Hickie 1853, vol. 1, p. 322; l. 375 identical in SEA 1838, p. 236, and in Bartlett 1968, p. 91 or Archive.org)

It's right to learn, even from the enemy.

A little learning is a dangerous thing, but we must take that risk because a little is as much as our biggest heads can hold.

Epops: The wise can often profit by the lessons of a foe, for caution is the mother of safety. It is just such a thing as one will not learn from a friend and which an enemy compels you to know. To begin with, it's the foe and not the friend that taught cities to build high walls, to equip long vessels of war; and it's this knowledge that protects our children, our slaves and our wealth. Leader of the Chorus [leader]: Well then, I agree, let us first hear them, for that is best; one can even learn something in an enemy's school. (tr. O'Neill 1938, Perseus)

He who learns must suffer.