A mathematical proof is not just a verification but a story that reveals deeper truths.
You can't let praise or criticism get to you. It's a weakness to get caught up in either one.
"Nur wer die Gefahr besteht, geht in sich."
Any sufficiently advanced technology is indistinguishable from magic.
The most valuable resource we manage isn't timber—it's trust.《Timber and Trust》
One of the advantages of being old is that you can speak your mind without worrying about the consequences.
从让一个人生气的事情大小就能看出一个人的价值。