The joy of mathematics is in the struggle to understand.
数学的乐趣在于努力理解的过程。
When the last tree is cut, the last dollar will lose its meaning.
The capacity of the human mind for forming and manipulating symbols is what sets us apart from other animals.
Optimism is a learned skill.
个体总是不得不努力，以免被部落淹没。
I don’t play for the money or the fame, I play for the passion.
伦理学的任务不仅是理解世界，而且是改变世界。