Freedom is nothing but a chance to be better.
自由不过是一个变得更好的机会。
永远不是失败，永远是一课。
——反复对革命党人说
科学不是凭经验行事。
A building must be both strong and gentle.
Man is defined as a human being and a woman as a female — whenever she behaves as a human being she is said to imitate the male.
数学的力量在于它的抽象性，使我们能够看到不立即显现的模式和联系。
To succeed, planning alone is insufficient. One must improvise as well.