古之立言者，皆有所为而为之，非苟而已也。
古代著书立说的人，都是有所为而为之，不是随便写写的。
煤炭行业要深化供给侧结构性改革，提高供给质量。
The more we have, the less we are.
The poor dream all their lives of getting enough to eat and looking like the rich. And what do the rich dream of? Losing weight and looking like the poor.