It is always safe to learn, even from our enemies; seldom safe to venture to instruct, even our friends.

It is always safe to learn, even from our enemies; seldom safe to venture to instruct, even our friends.

学习总是安全的，即使是向敌人学习;即使是我们的朋友，也很少能安全地冒险去教导别人。

-- Charles Caleb Colton 英国作家科尔顿