The essence of mathematics lies in its freedom.

有时最简单的问题会引出最深奥的理论。

I don't think that everyone should become a mathematician, but I do believe that many students don't give mathematics a real chance.

I'm not a photographer at all. I'm someone who uses photography.

Every decision we make at sea has a ripple effect on global food security.

When I look at the world I'm pessimistic, but when I look at people I am optimistic.