说真话的唯一方式就是怀着善意。只有充满爱意的人说的话才能被听见。
The only way to learn mathematics is to do mathematics.
"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."
Man is born free, and everywhere he is in chains.