出自先秦《荀子·性恶》引古语。不知儿子的为人，看看他的朋友就清楚了；不知国君是否贤明，看看他左右的大臣是什么德行就知道了。

Digital transformation isn't coming to mining - it's already here, and those who adapt will thrive.

When you lead， your real job is to create more leaders， not more followers.

If you can't explain it simply, you don't understand it well enough.