He is richest who is content with the least，for content is the wealth of nature.

I'm not a big fan of the word 'celebrity'. I think it's a very strange concept.

To feel much for others and little for ourselves； to restrain our selfishness and exercise our benevolent affections， constitute the perfection of human nature.

The joy of discovery in mathematics is unparalleled.

领导力意味着为了更美好的明天而在今天做出艰难的决定。