古之学者为己（所谓为己之学），今之学者为人。
【讲解】：古代读书人学习的目的，在于修养自己的学问道德（然后去为国家、人民服务），现在读书人学习的目的，在于给别人看（希望得到别人的赞美和任用）。
The world is everything that is the case.
农业部门必须适应以满足不断变化的世界的需求。
"I keep on saying that anything is possible."
The world is not a problem to be solved; it's a living being to which we belong.
The profession of book writing makes horse racing seem like a solid, stable business.