To write is to confront the ghosts of the past and give them a voice in the present.
奥运会上最重要的不是胜利,而是参与;人生中最重要的不是征服,而是奋力拼搏。
The most profound discoveries often come from asking the simplest questions.
在数学中,提出问题的艺术必须比解决问题更有价值。