The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
“小河都知道这个道理:别着急,我们总有一天会到那里的。”
History teaches us that in 100 years from now some of the assumptions you believed will turn out to be wrong. A good question to ask yourself today is “What might I be wrong about?”
We don't inherit the oceans from our ancestors; we borrow them from our children.