我们是没说出的话的主人。我们是说出的话的努力。

Mathematics is the organ with which we comprehend the phenomena of nature.

I've been waiting more than 30 years to say this: "Dad, I always told you I'd come back and get my degree." I want to thank Harvard for this timely honor. I'll be changing my job next year…and it will be nice to finally have a college degree on my resume.

译文：每天做的事，都要问心无愧才行，光阴容易逝去，希望能把这个信念坚持到老年。赏析：我们一生做事都要善于反省，做到防患于未然，避免发生更严重的错误。凡事粗心大意，鲁莽草率，必将带来祸害。