科学没有国界，因为知识属于人类，是照亮世界的火炬。
Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.
如果你收养了一只饥饿可怜的狗，并且让它舒适顺利，它将不会咬你，这便是一个人与一只狗之间最主要的差别。
数学的美在于它既是艺术又是科学。
教育者必须是一位心理学家，以便理解儿童。
The closer you are to death, the more alive you feel. It's a wonderful way to live. It's the only way to live.