You can't have a better tomorrow if you're still thinking about yesterday.
The most significant threat to liberal democracy today is not from rival ideologies like communism or fascism, but from within—from the rise of populism and the erosion of democratic norms.
Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
The dead are not powerless. Dead, did I say? There is no death, only a change of worlds.