改变是困难的，但对于进步是必要的。
Change is hard, but it is necessary for progress.
一个好的经济学家必须既是科学家，又是人文主义者。
You have to work hard to achieve your dreams.
Emotions are biological signals that prepare the organism for action.
In the world of mathematics, every question leads to another, creating an endless web of knowledge that connects all areas of science.
真正的领导力是为他人服务，而不是为自己。