闻贤而不举，殆；闻善而不索，殆；见能而不使，殆。
知道是贤人而不举荐，很危险；知道是善事而不表彰，很危险；知道他能干而不任用，很危险。
The beauty of mathematics is that it is one of the few areas of human endeavor where absolute truth can be known.
Tolerance is the quality of truly powerful individuals.
"The best biographies don’t just tell a life; they reveal a soul."
If you don’t take risks, you’ll always work for someone who does.