All books are divided into two classes, the books of the hour, and the books of all time.
所有的书都可以分为两类，一类是一时之书，一类是永久之书。
A LITTLE ENCOURAGEMENT
给此刻的你，一点向前的力量。
关于学习、善意与成长，读一句，再想一想。
Education is not only a ladder of opportunity, but it is also an investment in our future.
教育不仅是机会的阶梯，也是对我们未来的投资。
If we do not voluntarily bring population growth under control in the next one or two decades, the nature will do it for us in the most brutal way, whether we like it or not.
如果我们在未来一二十年里不主动控制人口增长，大自然将以最残酷的方式为我们控制人口增长，不管我们喜不喜欢。