● A wise man gets more from his enemy than a fool gets from his friend (Gracian)
● The enemy's opinion of us is closer to the truth than our opinion of ourselves (France)
● Knowing poisonous weeds is equivalent to finding a dose of good medicine; Seeing the enemy clearly is equivalent to finding a teacher (Tibetan)
● Not everyone can be a friend, but anyone can be an enemy (Europe)
● It is equally dangerous for you: your friend's enemy, your enemy's friend (Arabia)
● There is no friendship. The foundation is more stable than having a common enemy (Ireland). Use force to subdue the enemy (Mongolia)
If you don't fight against the enemy, you won't win
A weak enemy can't be underestimated, and a strong enemy can't be feared
Sometimes "friend" is a meaningless word, but "enemy" is not (Hugo)
All enemies can kill you (Valerie). Never let him touch your sword (Europe)
The enemy we don't suspect is the most dangerous (America)
There is an enemy at home, which is worse than a thousand enemies outside the door (Arabia)
If the fox speaks, the rooster should meditate (Albania)
Pay attention to your enemy, because they find you first.