在科学中，重要的不是获得新的事实，而是发现思考它们的新方法。
The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.
To feed the world, we must first understand it.
动力学的方程在用变分法的语言表达时是完全的。
赏析：指出知道满足的人不会被利益所累，真正安闲自得的人不会因为失去而恐惧，注重内心修养的人不会因为没有地位而惭愧。
战略就是做出选择、权衡取舍；就是要有意识地选择与众不同。
Zero-knowledge proofs are a way to prove that you know something without revealing what it is.