Swim upstream. Go the other way. Ignore the conventional wisdom.

Mathematics is not a spectator sport; to understand it, one must engage with it actively.

The closer you are to death, the more alive you feel.

温暖的雨和晴和的风初解冰冻，柳叶如眼、梅花如腮，已感觉到春心的萌动

过去总是紧张的，未来是完美的。