Life is a constant struggle between being an individual and being a member of the community.

The true test of a mathematical idea is its ability to inspire further thought.

诗歌是心灵的语言。

With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.

最好的数学不仅严谨，而且优雅。