仰之弥高，钻之弥坚。
【原文】颜渊喟然叹曰：“仰之弥高，钻之弥坚；瞻之在前，忽焉在后。夫子循循然善诱人，博我以文，约我以礼，欲罢不能。既竭吾才，如有所立卓尔。虽欲从之，末由也已。”【译文】颜渊感叹地说：“(老师的道德和学问)抬头仰望，越仰望越觉得高耸，努力钻研，越钻研越觉得深厚；看着好象就在前面，忽然又像是在后面。老师步步引导，用知识丰富我，用礼法约束我，想停止前进都不能。我竭尽全力，仍然像有座高山矗立眼前，虽然我想攀上去，却没有途径。”
The real reward in science is contributing to something greater than yourself.
太阳不会永远闪耀。
水泥生产中的创新必须平衡效率与环境责任。
Society can and does execute its own mandates， and if it issues wrong mandates instead of right， or any mandates at all in things with which it ought not to meddle， it practices a social tyranny more formidable than many kinds of political oppression， since， though not usually upheld by such extreme penalties， it leaves fewer means of escape， penetrating much more deeply into the details of life， and enslaving the soul itself.