Change is hard, but it is necessary for progress.

追求权力是所有大国的主要目标，这种追求常常导致冲突。

What I remember above all about Harvard was being in the midst of so much energy and intelligence. It could be exhilarating, intimidating, sometimes even discouraging, but always challenging. It was an amazing privilege…and though I left early, I was transformed by my years at Harvard, the friendships I made, and the ideas I worked on.

"The best children's books are those that respect the intelligence of the child."

The photograph is literally an emanation of the referent. From a real body, which was there, proceed radiations which ultimately touch me, who am here.

打铁必须趁热，但是要磨光它则不妨从容。