The spread of liberal democracy has been accompanied by the spread of a global culture that is increasingly homogeneous.

I believe that man will not merely endure: he will prevail. He is immortal, not because he alone among creatures has an inexhaustible voice, but because he has a soul, a spirit capable of compassion and sacrifice and endurance.

如果你想在数学上取得进步，你必须习惯于不舒服。