Learn from their enemies

This means that you can not automatically everything somebody does to as the "enemy" looks, and refuses to explain evil, but sees that an opponent may also have good ideas that you can then add your own copy /. Thus one learns. You have learned something from the enemy.

Stupid people see only the bad is the enemy and deny everything to do with him starting. Whether it is now its culture, its Progress, its language or its technology. While intelligent people sit from their enemy, but the progress may not know or what has the community. Previously had determined what to do with fighting techniques and weapons. The weapons of the enemy to build and then use it against him.

Betrayed? (or did you possibly mean 'conveyed'?) I'm not positive what Aristotle meant for sure, but I do have my own opinion on it. I would take it to mean that if you pay attention to what your enemy says, or does, that you can learn much from it. What can you learn? Well, their weaknesses for one, and also you can learn what kind of tactics they use to get what they want, or what kinds of tactics they employ to get the job done. Another thing one can learn from their enemies is what NOT to do, whether it's behaviors, tactics, or anything like that. There is also a parable: keep your friends close, and your enemies closer. I think that is a little in the same vein in that if you keep your enemies in your sight, you can: avoid attack, and probably learn the same kinds of info that I think Aristotle meant by his quote.