最优雅的数学证明是那些以简单揭示真理的证明。
The good life is not one immune to sadness, but one in which suffering contributes to our development.
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
"Silence in a picture book is as important as the images and words."
最深的爱往往是最沉默的