从来硬弩弦先断，每见钢刀口易伤。惹祸只因闲口舌，招愆多为狠心肠。
释义：过于强硬的弓弦容易断裂，过于锋利的刀口容易受损。惹祸往往是因为多嘴多舌，招致灾祸多是因为心肠狠毒。
看看你最终非常满意的一天。这不是你无所事事地闲逛的一天；这是你有一切要做并且你已经完成了的一天。
If you have an apple and I have an apple, and we exchange apples, we both still only have one apple. But if you have an idea and I have an idea, and we exchange ideas, we each now have two ideas.
The coal industry must evolve to meet modern environmental standards, or it will become obsolete.