The biographer's challenge is to be both a detective and a poet.

Every tree we plant today is an investment in tomorrow's clean air and healthy ecosystems.

译文：对于那些不熟悉的事情不要随便怀疑，与自己不同的意见不要轻易反对，这才是公正无私的好态度。

不用圆规和曲尺，就不能画出方形和圆形。比喻做事要遵循一定的法则。

To be alive is to be mortal. To be alive is to be, from moment to moment, a survivor.