The dead are never far from us. They’re in our hearts and on our minds and all around us.

革命不是熟透的苹果，自己掉下来。你必须让它掉下来。

Mathematics allows us to see the hidden structures that govern the world around us.

Every challenge in agriculture is an opportunity to redefine how we feed the world.

素描就是诚实。没有作弊的可能。画得好就是好，不好就是不好。

孩子们值得拥有挑战他们的书，而不仅仅是娱乐。