Science is a wonderful thing if one does not have to earn one's living at it.
科学是个美妙的东西——如果无须靠它维生的话。
It is a capital mistake to theorize before one has data.
One never reaches home, but wherever friendly paths intersect the whole world looks like home for a time.
Leadership means making tough decisions today that will benefit everyone tomorrow.
洞察力是对问题各部分之间关系的突然理解。