I’ve had to work very hard for every title. Nothing has been given to me.

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

What's terrible is to pretend that second-rate is first-rate. To pretend that you don't need love when you do; or you like your work when you know quite well you're capable of better.

I don't think that everyone should become a mathematician, but I do believe that many students don't give mathematics a real chance.

在危机时期，透明度比任何其他东西都能更快地建立信任。