In seeking the unattainable, simplicity only gets in the way.

数学的美在于它既精确又富有创造性。

不必担忧财富不多，只须担忧财富不平均，不必担忧人口稀少，只须担忧境内不安宁。……既来了，要使他们安家乐业。

The behavior of the whole cannot be predicted from the behavior of its parts taken separately.

不是要成为最好的，而是要变得比昨天更好。