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.

和其它动物相比较，婴儿在出生以后，要有更长的一段霎时间需要别人的照顾。

一本书本身就是一个世界，一个在我们眼前展开的宇宙。

Those who do not have power over the story that dominates their lives, the power to retell it, rethink it, deconstruct it, joke about it, and change it as they change, truly are powerless, because they cannot think new thoughts.

Collaboration in mathematics is essential; no one can solve all the problems alone.