科学的进步不仅是通过回答问题，而是通过提出更好的问题。
最好的钢材不是在熔炉中制造的，而是通过团队合作和共同目标锻造的。
The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.