唯一的限制是你为自己设定的限制。

Democracy must be born anew every generation, and education is its midwife.

I love Mickey Mouse more than any woman I've ever known.

Poetry is not a luxury, but a necessity.

我认为数学之所以有价值，是因为它具有这种令人难以置信的结构，你可以探索和发现。