心怀大志，努力工作。

——〈在北京基督教等六教会欢迎会的演说〉，1912年9月5日

To be a good mathematician, you need to have both intuition and rigor.

若我再见你，时隔经年，我将如何致意，以眼泪以沉默。

Mathematics is the poetry of logical ideas.

The dairy industry must evolve to meet both consumer needs and environmental challenges.

Never underestimate the power of a well-designed experiment.

I've always been interested in the idea of redemption and second chances.