世界上最好和最美的東西是看不見甚至摸不著的——它們必須用心去感受。
"??????? ?? ????? ?????? ??? ?????."
I'm not a person who likes to be ignored.
"Books are a way to explore the world, to understand different perspectives, and to develop empathy."
——《中國人之直言》（1920年4月3日）
追求極致性價(jià)比
There are no dull subjects. There are only dull writers.
"The greatest journeys are those that lead us back to our own humanity."
The most beautiful thing in mathematics is the simplicity of the ideas behind the complexity.