The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

"La belleza no es una cualidad de las cosas en sí mismas: existe en la mente que las contempla."

No Human Is Limited as Long as You Have the Desire.

Propaganda is to a democracy what the bludgeon is to a totalitarian state.

唱歌不仅仅是技巧，更是情感的传递。