The more we learn of the true nature of non-human animals, especially those with complex brains and corresponding complex social behaviour, the more ethical concerns are raised regarding their use in the service of man—whether this be in entertainment, as ‘pets,’ for food, in research laboratories or any of the other uses to which we subject them.

Technology in forestry should serve sustainability, not just efficiency.

Dance like nobody's watching.

The beauty of mathematics lies in its simplicity and depth.

【讲解】：聪明的人不会疑惑，实行仁德的人会忧愁，真正勇敢的人，不会畏惧。

决心：该做的事情一定要做，要做的事情一定做好。