Thinking is the hardest work there is, which is probably the reason why so few engage in it.

译文：学习、询问、思考、辨析、实践，都是做学问的方法，没有只学习而不实践的。

True leadership is measured by how well your team performs when you're not there.

I cannot fix on the hour, or the spot, or the look, or the words, which laid the foundation. It is too long ago. I was in the middle before I knew that I had begun.

【释义】当商品价格高涨时，要像对待粪土一样迅速出售；当商品价格低廉时，要像对待珠玉一样大量购入。

The future of coal lies in clean and efficient utilization.

情绪的存在是为了行动