The best picture books work on different levels for different ages.

The future of forestry lies in balancing economic growth with ecological responsibility.

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

国与国之间是平等的，人与人之间也是平等的，在人格与尊严上是没有贵贱之分的，上天对所有人都是一视同仁的，人生而平等是上天赋予每个人的不可被侵犯的权利。

"Grief changes shape but never truly leaves us."

"We are all in the gutter, but some of us are looking at the stars."