永远不要停止学习，因为生活永远不会停止教导。
"Never stop learning, because life never stops teaching."
Never be satisfied with current achievements, always aim higher.
we can go back to the cave if you like.
No matter what people tell you, words and ideas can change the world.
可持续性必须是现代采石场运营的基石，而非事后考虑。
I’ve learned that you have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.