The total amount of suffering per year in the natural world is beyond all decent contemplation.

In one minute you can change your attitude and in that minute you can change your entire day.

数学是一种超越文化和语言障碍的通用语言。

Life is too short to waste time on things that don't make your soul happy.

The past is always tense, the future perfect.

"Education is the kindling of a flame, not the filling of a vessel."

在探索宇宙的过程中，每一个被回答的问题都会引出更多的问题。