在我们内心有一片广袤的未知领域，如果要解释我们的情感波动和风暴，就必须考虑到这片领域。

The deepest problems in mathematics often arise from the simplest questions.

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

胆识要大，心思要细密；智慧要圆融，行为要方正。